Weezer taped a five-song "Sessions" performance for AOL Music on Thursday night (October 22nd) in Los Angeles, and the guest list included rapper Chamillionaire, pop singer Sara Bareilles and smooth jazz saxophonist Kenny G. According to Spinner.com, Kenny G did a solo on the new Weezer song "I'm Your Daddy," Bareilles duetted with frontman Rivers Cuomo on current single "(If You're Wondering If I Want You To) I Want You To," and Chamillionaire threw down some verses on "Can't Stop Partying" as a stand-in for Lil Wayne, who raps on the studio version of the track but was in court on Thursday to face gun possession charges.

Cuomo and Kenny G. are neighbors in Malibu but had never met each other before the session, with Kenny saying, "I don't know anything about Weezer -- nothing. I've heard the name, but I never knew any of their songs (except) some song about a sweater ... with the wool coming apart?"

Bareilles recently shot a video with Weezer for an acoustic version of "(If You're Wondering If I Want You To) I Want You To." The video for the album version, starring actress Odette Yustman, arrived last week.

Chamillionaire flew in from Houston on Thursday just for his guest spot. Cuomo, a fan of the rapper's hit, "Ridin'," said that the hip-hop star "blew us away!" The band also performed an acoustic version of Green Day's "Brain Stew" during the taping, which will be posted online next month.