Behind the Scenes at Festival Supreme

Andy Dick and Adam Sandler joke around backstage.

Conan O'Brien backstage right before performing with Triumph at Festival Supreme.

Jack Black and David Cross catch up backstage at Festival Supreme.

Zach Galifianakis relaxes in his dressing room at Festival Supreme.

Maya Rudolph and team Princess hang out with Jack Black at Festival Supreme.

Beardyman takes a break after performing at the Club Intimacy tent at Festival Supreme.

Brian Posehn backstage at Festival Supreme.

Craig Robinson and the Nasty Delicious at Festival Supreme.

Demetri Martin has a last-minute cram session backstage.

Kevin Pollock lashes out backstage at Festival Supreme.

Ed Sheeran poses backstage at Festival Supreme.

Nancy and Beth phone home before their set at the Mighty Tent at Festival Supreme.

Reggie Watts poses backstage at Festival Supreme.

Billy Idol and Eric Idle share a laugh before taking the stage at Festival Supreme. 

Fred Armisen getting into character before playing as Ian Rubbish and the Bizzaros at Festival Supreme. 

Garfunkel & Oates pose at Festival Supreme.

Hannibal Buress hangs out in the VIP area at Festival Supreme.

Jason Sudeikis smiles backstage at Festival Supreme.

Headliners Tenacious D relax after their set at Festival Supreme.

The Mighty Boosh goof off in their dressing room at Festival Supreme.

The Neil Hamburger Band enjoying the show underneath the stage at Festival Supreme.

The Gregory Brothers try to fit in the porta-potty together at Festival Supreme.

Surprise guests the Lonely Island pose backstage at Festival Supreme.

Steve Jones from the Sex Pistols performed with Fred Armisen's band, Ian Rubbish and the Bizzaros, and caught up with Tim Robbins backstage at Festival Supreme.