Justin Bieber, Usher, Jaden Smith Steal the Stage at 2011 Grammys

Justin Bieber -- joined by Usher and Jaden Smith -- took the stage at the 2011 Grammys for an impossible-to-beat performance of hits.

Eva Longoria gave the introduction for the 16-year-old pop superstar who needs no introduction. Longoria told the sweet story of Bieber's climb to fame (as told in his new 3D film, 'Never Say Never') and showed a clip from 2007, when the 'One Less Lonely Girl' teen first sang for his mentor, Usher.

Bieber recalls what Usher said to him on their first meeting: "If it was meant to be that we'd meet again." Usher chimes in, "Here's your time," as the Biebs -- armed with just a guitar -- led into an acoustic snippet of his claim-to-fame song, 'Baby.' Masked men beating drums led the swoop-haired superstar into a blow away performance of 'Never Say Never' -- and Jaden Smith got his moment to shine, while Will and Jada Pinkett-Smith smiled proudly from the audience.

Lights flashed as Usher -- who gave Bieber his moves -- as he danced onto the stage for a performance of his hit song, 'OMG,' which Bieber joined at the end. As the lights came up, Biebers face glowed with an ear-to-ear smile, which echoed the message that he tries to convey at any given opportunity -- "never say never."