With naked photos of Cassie that leaked online (twice in one WEEK!), and now, what may be photos of Rihanna naked, we're starting to wonder if taking naked photos of yourself (and having your naked photos leak onto the Internet) is the new Lost?

According to a study by the National Campaign to Prevent Teen and Unplanned Pregnancy (they get PAID to study sexting!) one in every five teenagers has sent or posted naked photos of themselves. Combine the inexplicable popularity of sending naked photos of yourself (what ever happened to giving your love a lock of your hair? So much more romantic!), using your dog's name as your password for everything, and a gnarly break-up, plus a few easy peasy keystrokes, and you've got an unfortunate recipe for public humiliation in the form everyone seeing your naughty bits and birthmarks. (Including your teachers and parents! GROSS!) And if you're famous, you've got even more to lose. Just ask pop stars like Miley Cyrus, Pete Wentz, Lily Allen, and more, who've had their naked or naughty photos accidentally shared with the world -- and fortunately recovered from the fall out to pull off career comebacks.

And remember -- if you're gonna take naked pictures of yourself... don't.

Cassie: Not only did Cassie make headlines recently for shaving half her head bald, but this week not one but two naked photos of her leaked online after they were stolen from her personal computer. Cassie admitted that the photos were hers, referred to the person who leaked the naked photos as "evil," and told the world that we all basically need to get over her boobies and get on with our lives.

Pete Wentz: Pete Wentz was sending naked Sidekick photos of himself back before it was all the rage -- and back when people still used Sidekicks. His naked photo incident went down in 2006, when Pete proved to the world, once and for all, that he really likes Morrissey. Pete himself summed up the penisgate incident quite succinctly when he told MTV News, "If you really don't want pictures of yourself to end up on the Internet, don't take the pictures." Wise words from the now-family man.

Vanessa Hudgens: Disney darling and "Sneakernight" singer Vanessa Hudgens suffered her own sex scandal when several naked and nearly-naked photos found their way to the Internet in 2007. Vanessa apologized to her fans, made four movies (including High School Musical 3) following the incident, and scrubbed away the scandal by continuing her stint as the face of Neutrogena. Vanessa was named one of People's most beautiful people in 2009, plus, she dates Zac Efron, so she wins.

+ Lily Allen, Miley, and Britney after the jump!

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Move over ye few remaining aggro Jonas Brothers fans. The latest crop of Internet trolls taking on Tokio Hotel fans are... Rick Astley fans. Yes. For. Reals.

The 42-year-old British pop singer, best known for his 1987 cheeseball soul-pop hit "Never Gonna Give You Up" -- and, indirectly, for the obnox act of Rickrolling (which, again, I insist would be way more fun if it were RickRossRollin) -- is up for a 2008 MTV Europe Award in the same category as Tokio Hotel. Yes. For. Reals.

Along with Britney Spears, Christina Aguilera, Green Day, and U2, Rick Astley and Tokio Hotel are nominated for the Best Act Ever award. That's no small kartoffeln for a band as young as Tokio Hotel. And it's proof that Rick Astley fans, who got him nominated by an open write-in process (even the Ricker himself didn't see the nomination coming) truly can't give up on the Conan O'Brien lookalike. Or the dream. Or the meme. That, or, they just want to know what the simultaneous heartbreak of millions of Tokio Hotel fans sounds like if underdog Astley does in fact pull through. (And sorry, but Britney REALLY deserves it too. Epic comeback, y'all!)

And there's actually a chance that Rick Astley could take it -- allegedly his fans have been voting en masse and bombing Tokio Hotel message boards with spam and porn (how woode!), causing some Tokio site admins to temporarily suspend their forums, which is like taking food away from a puppy!

Even if Rick Astley does win, and despite the fact that he's sold in the ballpark of 40 million records over the course of his career, it's safe to say he's not exactly the next Bill Kaulitz or anything, as suggested by the obviously doctored photo above.

Anyway, Rick Astley fans, you kids play nice with Tokio Hotel fans! And may the best man, men, or women win when the EMAs air Thursday, Nov. 6, 2008 in Liverpool.

But until then, watch Rick Astley do the awkward white dude shimmy:

Rickrollin' -- the harmless yet annoying bait-and-switch practice of intentionally misleading an unsuspecting Internet reader from an intended link to a covert Rick Astley video (see also: "dorkiness") -- is no new phenomenon, but it may have officially jumped the shark as of this interview, which confirms that Rick Astley himself is fully cognizant of the practice.

What this means (aside from the fact that bizarrely, Rick Astley now looks slightly like Jason Bateman) is that all you low-grade haxx0rs out there need to find a new game. Which is why we suggest RickRossRollin' -- same idea, different video: Rick Ross' "Hustlin'."

Also: MTV.com has not one, not two, but EIGHT Rick Astley videos! We went with what we editorially determined is the most annoying one of all.

And finally, there was a time when Rick Astley looked like Rick Springfield, a time when Rick Springfield looked like Tommy Lee, and a time when Rick Springfield breaking his arm made news. Weird.