Justin Bieber's VMA Rehearsal: An Inside Look!

Best New Artist nominee pulls out all the stops for performance.

LOS ANGELES -- Justin Bieber, surrounded by his band and dancers, went virtually unnoticed during his security-heavy and enthusiastic VMA rehearsal Friday afternoon (September 10), though the fans who did spot him shouted excitedly at the surprise performance.

Wearing Wayfarers and a red-and-white varsity jacket (which he alternated with a black leather jacket) over black shirt and pants, Bieber took the stage and previewed his debut VMA performance. The setup was comprised of only two round stages. Bieber, who is up for Best New Artist at Sunday's VMAs, ran through his set, which includes a medley of his biggest songs.

To very little fanfare from onlookers who didn't even realize the teen star was putting on a show in broad daylight, he told the minglers in between songs, "What's up, everybody? I love you! You want me to start?"

He didn't miss a beat during the run-through, even when a part of his mic fell to the stage. His entrance and exit will leave his fans excited as they watch from their couches, because the pop sensation is out to prove to the non-Beliebers that he isn't going anywhere anytime soon.

We caught up with Bieber pal Selena Gomez on Thursday, and she said her fellow teen superstar is a shoo-in for Best New Artist. "I think he deserves it!" she told MTV News in L.A., not far from the Nokia Theatre, where the show is set to take place. "I think he's worked really hard. I think he works harder than a lot of people I know, so he deserves it."

The 27th annual MTV Video Music Awards will be broadcast live from the Nokia Theatre in Los Angeles on Sunday. The party starts with MTV News' VMA Pre-Show at 8 p.m., followed by the main event at 9 p.m. ET/PT.