Buzz Bites (3/4/11): Ke$ha Talks Britney Spears’ ”Till The World Ends’

(Credit: Ray Tamarra/Getty Images)

+ Ke$ha has revealed the true purpose of “‘Till The World Ends,” the song she wrote for Britney Spears: “I hope it gets everyone’s ass on the dance floor cuz y’all know that’s what K-Monay does best!”(MTV News)

+ Christina Aguilera isn’t letting her arrest get her down. The “Not Myself Tonight” singer is already back at work, seen at a Los Angeles recording studio. (TheFABlife)

+ Check out some more sultry pics of Kim Kardashian on the set of her “Jam” video. (Celebuzz)

+ Miley Cyrus hammed it up with a fake mustache last night on “Late Night With Jimmy Fallon.” (Just Jared Jr.)

+ Lady Gaga‘s music can create havoc for sign language interpreters. (Vulture)