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(Credit: Splash News)

Thousands and thousands of kids, both literally and the ones who are young at heart, will flock to the movies this weekend to see one of the final installments of the Harry Potter saga, "Harry Potter And The Deathly Hallows, Part 1."

But some kids have been lucky enough to have already seen the flick. And when you're Madonna's daughter, you tend to be lucky. Which is why Lourdes Leon found herself at the "Harry Potter And The Deathly Hallows, Part 1" premiere this week in New York City.

Lourdes is no stranger to hanging out with famous teens, as the Material Girl fashion designer has spent some quality time with Taylor Momsen in the past. But, to our knowledge, she's never spent time with such magical folks such as Emma Watson, Daniel Radcliffe and the rest of the "Harry Potter" cast.

Check out another pic of Lourdes enjoying herself at the "Harry Potter And The Deathly Hallows" premiere, below. "Harry Potter And The Deathly Hallows, Part 1" opens today.

Tags Emma Watson, Lourdes Leon, Madonna, Star Spotting, taylor momsen

The guys from A Day To Remember have been keeping us updated all month long as they travel the world performing for fans, acting like goofballs, and you know, being rock stars and stuff. They're sending us tweets, blogs, photos and videos from every pit stop on their tour, and we're relaying them back to you, free of charge on Posted.MTV.com. Karma, guys: Get into it.

In their latest Posted update, A Day To Remember performs "The Plot To Bomb The Panhandle" live in Australia. The energy is instant, the guys kill it and the amped-up crowd whips their shirts around their heads "like a helicopter," Petey Pablo style. (Cue applause for incorporating a Petey Pablo reference into a post about a pop mosh band.)

Check out A Day To Remember performing "The Plot To Bomb The Panhandle" live in Australia below and head over to Posted.MTV.com for more A Day To Remember than you can shake a stick at.

Related Content Read Jeremy McKinnon's Tour Diary

Tags A Day To Remember, Posted, video

(Credit: Splash News)

For the last few weeks we've heard a barrage of new Ke$ha material, all stemming from her new mini-album/EP Cannibal, which will be released along with the reissue of her debut album, Animal.

With "We R Who We R," "Blow" and the title track, "Cannibal," all floating around out there, and Cannibal's release scheduled for Nov. 22, it may seem like an odd time for Ke$ha to drop two new videos for songs from Animal. But Ke$ha pretty much does whatever she wants, right?

First up is "Animal," which sort of reminds me of Katy Perry's "Firework" (yes, it predates the Perry track). "Animal" is a slow-building anthem that goes from mid-tempo ballad to dance-floor lifesaver. The video might be the classiest thing Ke$ha's ever done; there's nary a trashed house or trashed partygoer in sight.

"Stephen" is a different animal (haw haw) all together. If Ke$ha's two major interests are partying too hard and falling in love too fast, then "Stephen" definitely covers the latter. It's a digitally damaged, obsessive track with a video made up of still shots of Ke$ha going to some extreme lengths to show "Stephen" how much she's feeling him.

Check out Ke$ha's videos for "Animal" and "Stephen" below.

+ Watch Ke$ha's "Animal" and "Stephen" videos.

Tags Katy Perry, Ke$ha, video

(Credit: Splash News)

We love Taylor Swift. And you know what Taylor Swift loves? Boys. Or at least talking about them and obsessing over them and writing music about them. If you Google "Taylor Swift talks boys," you get 1,680,000 results. And that's totally scientific.

So we thought we'd come up with some other stuff Taylor Swift could channel all her boy craziness into. They might be a little weird, but we gotta cure girlfriend of her lovesickness somehow, right?

1. Taylor Should Obsess Over Making Stuff For Etsy
Maybe channel all that boy-crazy energy into making Scrabble necklaces or earrings that look like French fries.

2. Taylor Should Obsess Over Flipping Houses
We know Taylor Swift has an eye for interior design, so imagine Taylor Swift postponing her next album because she was busy knocking down walls to create breakfast nooks and getting into arguments with granite salesmen over the price of Travertine countertops?

3. Taylor Should Obsess Over Writing "Lord Of The Rings" Fan Fiction
When it comes to the real world, Taylor gets all worked up about the boys. Maybe she needs to think about another world, or a Middle Earth? How about spending your time penning tales about the horse maidens of Rohan or something?

4. Taylor Should Obsess Over Her Fantasy Football Team
It's safe to say there are few demographic groups Taylor has yet to conquer, but trust me, if she started spouting off about Arian Foster or Josh Cribbs in interviews, the world's stat-crunching fantasy football dorks would be putty in her hands.

5. Taylor Should Obsess Over A Career In Hip-Hop
We already know that Taylor Swift can rap--remember "Thug Story" with T-Pain? If Taylor Swift started rapping full time, she could FINALLY collaborate with Kanye West! It'd be the greatest collaboration OF ALL TIME!

+ What do you think Taylor should become obsessed with? Let us know in the comments.

Tags Kanye West, T-Pain, Taylor Swift

The best thing about Twitter might be the anonymous opinions you get from internet strangers. This week, Pink got a handful of random advice when she asked her "tweethearts" how to tell her dad she was pregnant. But thankfully she was joking--Pink didn't actually tell her dad she was pregnant on Twitter...we hope.

Other favorite celebrity tweets from this week include Justin Bieber marking the one-year anniversary since the debut of My World, Lady Gaga giving us subtle hints about her new album and Katy Perry promoting her new Purrfume. Ciara gives us yummy food tips, and Maroon 5's Adam Levine dukes it out with the hotel minibar. Photos, or it didn't happen, Adam (preferably shirtless).

Also this week: Rihanna gets a private showing of Justin Bieber's abs (and pleads with the Bielebers not to kill her), Taylor Swift flies around the world and Kanye West makes my life easy and tweets "the greatest tweet of all time." I think that joke is here to stay, folks.

Check out all of the celebrity tweets from this week below and follow us at @MTVBuzzworthy!

PINK
@pink
ok tweethearts: here's my own personal official whatever...... Carey Hart knocked me up and i don't know how to tell my dad. what do i say?

JUSTIN BIEBER
@justinbieber
Today is the 1 year anniversary of the MY WORLD album....1 year ago. crazy so much has happened since then. Thank u all. just gettin started

KATY PERRY
@katyperry
Please allow me to introduce my latest kitty addition to the family, her name is #Purr... http://twitpic.com/37ebt0

KANYE WEST
@kanyewest
You have to balance ignorance with intellect! Can't have school with out recess! #Greatesttweetofalltime

TAYLOR SWIFT
@taylorswift13
Just realized this week I'll be completing a loop around the world. Nashville to London to Tokyo to LA back to Nashville. So. Much. Flying!

RIHANNA
@rihanna
Justin Bieber just flashed me his abs in the middle of a restaurant! Wow! He actually had a lil 6 pack! Sexy, lol! #Beliebersplzdontkillme

CIARA
@ciara
Try this: put a little candied yams on top of your cornbread! it will be turned all the way up!

LADY GAGA
@ladygaga
Endless melodies, hooks, + poetry sledge-hammering my skull. It won't be much longer, its almost perfect. But I (we) don't want almost.

MAROON 5's ADAM LEVINE
@adamlevine
That hotel mini bar never had a chance. I've won this battle...but the war is never over...

SNOOKI
@Sn00ki
my boyfriend loves to surprise me god he's amazing!! http://plixi.com/p/57689824

Related Content Last Week In Celebrity Tweets, Watch Rihanna Perform 'What's My Name' Live On 'The Seven'

Tags Adam Levine, Ciara, justin bieber, Kanye West, Katy Perry, Lady Gaga, Maroon 5, Pink, Rihanna, Snooki, Taylor Swift

Next week Kanye West, Nicki Minaj and Justin Bieber are all releasing new albums. Hold up, BRB, just breathing into a brown paper bag for a few.

OK, back! So yes, next week is a HUGE week for new releases, with a parade of big-name artists all releasing new albums. Both Kanye West's My Beautiful Dark Twisted Fantasy album and Nicki Minaj's Pink Friday album drop on Tuesday, Nov. 22, while Justin Bieber's My World Acoustic comes out on Friday, Nov. 26 exclusively at Target.

The obvious question is, who will sell more albums in this big new-music week? But it's a loaded query since we're talking about three artists who have a lot of respect and affinity for one another.

Nicki and Kanye guest on each other's album, with Nicki showing up on "Monster" as well as "Dark Fantasy" and the Louis Vuitton Don returning the favor on Nicki's "Blazin'."

Meanwhile, Kanye West and Justin Bieber have publicly praised one another over Twitter, leading Kanye to remix Justin's "Runaway Love." And we all know how Justin and Nicki feel about one another.

So with all that crossover appeal out of the way, we ask you, who do you think will sell the most albums their first week out? Kanye has arguably never been more hot. Nicki Minaj has her Barbie Army and Young Money behind her, and, acoustic set or not, Justin Bieber is still Justin Bieber!

+ Vote in the poll and tell us who you think will sell the most albums when all's said and done--Kanye West, Nicki Minaj or Justin Bieber. And take to the comments to let us know what you're most excited to hear in the comments.

Related Content Watch A Sneak Peek Of Nicki Minaj's 'My Time Now' Documentary Before It Airs On Sun. Nov 28 On MTV

Tags justin bieber, Kanye West, Nicki Minaj, Poll

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I, personally, demure whenever my hairstylist asks if I'd like a little product in my hair. That's just me. I also don't brush my teeth with Jack Daniels, like our girl Ke$ha. So when presented with the opportunity to use a little sculpting gel, Ke$ha quite clearly went to town.

At last night's Us Weekly Stars Who Care Party, the "We R Who We R" singer was working a hairdo that was one part Ed Grimley, one part lazy mohawk.

Also in attendance were folks such as Chris Brown, Brandy and Taio Cruz, though none of them sported such eye-catching, gravity defying hair as Ke$ha.

Generally, the frequency and insanity of Ke$ha's paparazzi photographs are linked to whether or not she has a new release coming. So wouldn't you know it, Ke$ha's Cannibal drops on Nov. 22. Not that we're complaining. We can't get enough of her pics or her music.

Check out another shot of Ke$ha's mohawk, below. And see how Ke$ha got the dollar sign in her name.

Tags Brandy, Chris Brown, Ke$ha, Star Spotting, Taio Cruz

(Credit: Splash News)

+ Rihanna told New York radio personality Angie Martinez that she's had offers to pose nude for Playboy, but she's turned them all down. She went on to claim that if she did don her birthday suit it would have to be "classy." (CeleBuzz)

+ Beyonce is working on her follow-up to her massive I Am...Sasha Fierce. And according to Ne-Yo things are sounding pretty good so far: "In a minute nobody will be in Beyoncé's lane. They really can't get in her lane now, but they really can't get in her lane after this album." (MTV News)

+ Fans tuning in to catch the special post-Super Bowl episode of "Glee" will see the cast reportedly perform songs by Katy Perry, Black Eyed Peas and Michael Jackson. (Idolator)

+ Chris Brown received high marks from the judge presiding over his probation. (PopEater)

+ Katy Perry will be releasing the somewhat controversial "Peacock" as the follow-up single to "Firework." (That Grape Juice)

Tags Beyonce, Black Eyed Peas, Chris Brown, Glee, Katy Perry, Michael Jackson, Ne-Yo, Rihanna

If after watching Bruno Mars' "Just The Way You Are" video or his "Billionaire" video with Travie McCoy, you thought Bruno Mars was an easy, breezy type of guy, then you clearly haven't seen all of Bruno Mars.

In his brand-new video, "Grenade," off of his Doo-Wops & Hooligans debut album, Bruno Mars demonstrates that when it comes to heartbreak, he goes hard. How hard? Well for one thing, he's willing to drag a piano through an entire city, rain be damned. And that's on top of his willingness to jump in front of a train, take a bullet or catch a grenade. All for a girl who won't even give him the time of day. That's a lot of sacrifice.

To make desperate matters even more desperate, piano-dragging, bullet-taking and grenade-catching aren't just figurative hyperbolic extremes, as Bruno Mars demonstrates in his "Grenade" video. Eek.

Bruno, buddy. We need to talk.

+ Watch Bruno Mars' "Grenade" video.

Tags Bruno Mars, video

(Credit: VH1)

A USO girl isn't just a vague Halloween costume--it's an actual old time-y thing (you know, like Discmans). The USO has been providing entertainment to help boost morale for troops serving in the United States military since 1941. This year, the VH1 Divas pays homage to our patriotic pinups of yore in these posters for their upcoming "The USO Presents: VH1 Divas Salute the Troops" special, starring some of Buzzworthy's favorite ladies.

Above we see Katy Perry representing the Air Force, sporting a Bettie Page 'do and a camouflage jumpsuit, which actually isn't much of a departure from her usual performance outfits. Nicki Minaj looks classy and more subdued than usual (if an orange wig qualifies as subdued) striking a pose on top of an Army truck. Paramore's Hayley Williams helps cheer on the Navy and is kitten-status adorable, rocking the eff out of that sailor getup and cropped red bob. And we're not sure which branch of the military Keri Hilson is repping in this picture, but we know she looks really good doing it.

Be sure to catch performances from Katy Perry, Nicki Minaj, Paramore, Keri Hilson and more on "The USO Presents: VH1 Divas Salute the Troops" on Sunday, Dec. 5, at 9/8c on VH1.

Tags Hayley Williams, Katy Perry, Keri Hilson, Nicki Minaj, Paramore