In the middle of Maroon 5's performance of their catchier-than-a-cold smash single 'Moves Like Jagger' on the 2011 American Music Awards, the camera cut to the crowd where besties Taylor Swift and Selena Gomez were on their feet, singing along and grooving like they were a pair of fans at a Maroon 5 concert. Hey Adam Levine, Taylor and Selena dig you and your song. Maybe it's high time you collaborate with them, too?

Levine, who has rocketed even further into the stratosphere with this hit single and his role as a coach on 'The Voice,' looked comfortable in the role of pop rocker on the AMAs stage, that's for sure.

Levine's 'Voice' co-star Christina Aguilera was on site to perform her parts of the song. Xtina was wrapped in a short, silvery, halter-topped dress. We couldn't help but say "hello" to her twins, which looked enhanced. Maybe it was the cut and fit of the dangerously short 'n' sexy mini, which hugged her famous curves, but Xtina looked waaay more endowed than usual. She wore her hair in massive, '70s disco-type curls and ditched her blood-red lipstick for a softer pink hue.

Levine pulled double duty, finishing his band's song and then walking to the other side of the stage to perform 'Stereo Hearts' with Gym Class Heroes, as he guests on the studio version of the song, which is all over the radio right now. We dug the huge boombox stage prop and how Levine and Travie McCoy got the crowd to put their hands in the heart shape.

During this song, the camera once again panned to Taylor and Selena, who were once again enjoying one of the most buoyant songs of 2011. Gomez and Swift aren't the only famous friends -- Levine and McCoy bro-hugged when the song closed.

Watch Adam Levine and Christina Aguilera Perform at the 2011 AMAs

Watch Adam Levine and Gym Class Heroes Perform at the 2011 AMAs