Greyson Chance performs "Waiting Outside the Lines."

Selena Gomez & the Scene performs "Who Says."

Mitchel Musso performs "Get Away" and participates in a sketch.

Tony Hawk guest stars and does a sketch on the show while the main cast of the show tries to make him do something extreme. He finally flies out at the end of the show.

Coco Jones performs "Stand Up" and participates in a sketch.

Jacob Latimore performs "Like 'Em All".

Mindless Behavior performs "My Girl". The So Random! cast are trying to find Rufus.

Colbie Caillat performs "Brighter Than the Sun".

Far East Movement performs "Rocketeer", with special guest Miguel.

Kicking Daisies performs "Keeping Secrets".

Dave Days performs "What Does It Take".

Hot Chelle Rae Performs "Tonight Tonight".

Miss Piggy guest stars and participates in several sketches.

Iyaz performs "Pretty Girls" featuring Mann.

Lemonade Mouth (Bridgit Mendler, Adam Hicks and Hayley Kiyoko) perform "Determinate" and Bridgit Mendler and Adam Hicks participates in a few sketches.

Pia Toscano performs "This Time" and Leigh-Allyn Baker and Mia Talerico participate in a few sketches.

Justin Bieber performs "Mistletoe".

Christina Grimmie performs "Advice".

Andy Grammer performs "Keep Your Head Up".

Cole and Dylan Sprouse participate in several sketches.

The Ready Set performs "Young Forever".

China Anne McClain performs "Unstoppable" and participate in a few sketches.

The New Boyz performs "Meet My Mom".

Shane Harper performs "One Step Closer".

Destinee & Paris performs "True Love".