At 21 years old, Justin Bieber has an impressive resume as a live performer. His first world tour had the young star playing sold-out arenas at age 16; this year, he's bigger than ever after his latest album, Purpose, produced three Number One singles. Before he takes the stage at the Grammys next week, take a look back at some of Bieber's best televised performances at the Grammys and other awards shows.