Video: Katy Perry Gyrates and Sings With Mick Jagger, Plus More Headlines! Video: Taylor Swift Sends Selena Gomez a Private Dance Video, Plus More Headlines! Get an Inside Look at NYC's Dress Gatsby Bash With Carey Mulligan and More! Katy Perry Channels Her Inner Smurf in Two Blue Looks The Best-Dressed Celebrities at Coachella's First Weekend The Style Set Flocks to Coach's Annual Benefit Video: John Talks Katy Breakup, Angelina Opens a School, and More Top Headlines The Best Celebrity Looks From Coachellas Past! Video: Britney Spears Heads to Church, Justin Bieber Tries to Sneak His Monkey Into Germany, and More! Video: Kristen Stewart and Robert Pattinson Reunite in LA — Plus Kristen at the Kids' Choice Awards Video: Rob and Kristen Sing "Happy Birthday" With Katy Perry, Plus More Headlines! Video: Katy Perry and John Mayer Split Again, Kate Upton Considers Going to Prom, and More! Video: John Mayer Says Relationship With Katy Perry Doesn't Feel Like a Celebrity One and More! Video: Katy Perry's Date Surprising Grammys Date — Allison Williams! Video: Beyoncé's Website Crashes Due to Ticket Sales, Ryan Seacrest's New Show With The Wanted, and More! John Talks Katy — and More of Today's Headlines! Video: Katy Perry in Drag, Girls Renewed, and More Headlines! Video: Beyoncé, Kelly Clarkson, and Katy Perry Celebrate Obama's Inauguration! Video: Go Inside the Kids' Inaugural With Katy Perry, Usher, and the First Lady! Taylor Swift, Jennifer Lawrence, and More of the Best People's Choice Beauty Looks Video: Katy Perry, Jay-Z, and More Stars Want You to Vote! Video: From Cold to Hot — Katy and John Make Their Romance Very Public Video: A Beyoncé Countdown Remake, Katy Perry Karaoke, More Viral Hits! Video: Inside Robert Pattinson, Justin Bieber, and Selena Gomez's Night Out With Katy Perry!