The ever-stylish Jonas Brothers turned up in Los Angeles last night, where the boys helped honor the Grammy Foundation's MusiCares Person of the Year—Neil Diamond!

The brothers three performed performed Diamond's hit "Forever in Blue Jeans," as Joe Jonas' steady Camilla Belle watched from the audience of music heavy-hitters.

Stars including Josh Groban, Foo Fighters, Michael Buble and American Idol judge Kara DioGuardi stepped out as well to honor the legendary Diamond, performing selections from his songbook.

Rocker Chris Cornell tackled Diamond's "Kentucky Woman," and Groban took on "Play Me," while a stunning Jennifer Hudson (fresh off her Superbowl triumph) performed "Holly Holy."