IHeartRadio's holiday fest brings pop's biggest stars to Madison Square Garden for the ultimate selfie-a-thon
Filling the National Mall with over 100,000 people, the emotional Veterans Day tribute featured everyone from Meryl Streep to Dave Grohl
U.K. pop star tries again to take the States, with limited results
Nick Jonas, Jessie J and Shawn Mendes set to perform for 15th annual celebration
Plus, see who got the MTV Video Music Awards sales bump
Three of the biggest pop stars share a moment in the clip for what Jessie J has called a "female anthem"
Beyoncé's stunning performance, Taylor Swift's pop breakout and more highs and lows from MTV's most outrageous night
Ariana Grande and Jessie J also join Minaj for "Bang Bang," while Grande busts out of a spaceship for "Break Free"
British pop star says her new LP toes the line between singing about heartbreak and lying "naked on the bathroom floor"
Singer breaks out the glitz, glamour and chorus girls
The "Blurred Lines" singer will hit the road in February
Rita Ora, Florence and the Machine, Madonna and more hit the stage for London benefit concert
Festive 'Symphony of British Music' spectacle focuses on U.K.'s main cultural export
Band will join the Who, George Michael and the Spice Girls
Performances will be available digitally after each event concludes