Madonna and Taylor Swift perform at the iHeart Radio Awards

Charli XCX, Tinashe & Ty Dolla $ign at the MTV Movie Awards

Sam Smith at the BRITS Awards

Nick Jonas at Kids' Choice Awards

Deadmau5 at the JUNO Awards

Rihanna, Kanye West, and Paul McCartney at the GRAMMY Awards

Lady Gaga at The Academy Awards