Katy Perry performed with The Rolling Stones over the weekend!

+ Watch Katy Perry strutting and rocking it with The Rolling Stones during their Saturday tour stop at Las Vegas' MGM Grand Garden Arena. Together they performed a killer rendition of the Stones' classic "Beast Of Burden." (Billboard)

+ Miley Cyrus might be dropping some new music soon! "Maybe y'all will find out a LIL sum at the up coming @billboard music awards!" she tweeted. "Maybe.... Like.... A.... Singgggg.....llllleeeee................." The 2013 Billboard Music Awards air this Sunday. (MTV News)

+ We don't know about your high school principal, but ours wasn't a cool rapper like Kendrick Lamar. As part of the "Get Schooled Celebrity Principal For The Day" program, Kendrick visited Rhode Island's Mount Pleasant High School. "Without education you don't have anything," the 4.0 achieving student and rapper shared. (Rap-Up)

+ Demi Lovato is on today's "The Ellen DeGeneres Show." During the interview, she addressed why she changes the color of her hair frequently. "I do this often... as you've heard, I'm bipolar. So I change my hair a lot," she explained. (Just Jared)

+ And speaking of Demi (who releases her latest album, Demi, tomorrow), watch her perform "Give Your Heart A Break" and watch Maroon 5 rock their "Moves Like Jagger" during Saturday's Wango Tango event in Los Angeles. (Idolator)

+ We're hoping G.O.O.D. Music's Hudson Mohawke will preview every new Kanye West song. Last week, he dropped some 'Ye snippets at an event in Dublin, and over the weekend, he played two more new Kanye tunes at another show in Poland. Check them out. (Pitchfork)

+ Vampire Weekend are set to drop their new album, Modern Vampires Of The City, tomorrow, and they performed on "Saturday Night Live" leading up to the release. Watch them play "Diane Young" and "Unbelievers" from their "SNL" appearance. (Rolling Stone)

Photo credit: Getty Images