Hosted by actor/comedian John Leguizamo, Nickelodeon's Mega Music Fest will feature celebrities like Colbie Caillat, Wyclef Jean, and The Roots performing never-before-seen duets with Dora the Explorer, the cast of 'Yo Gabba Gabba!', and Kai-Lan, plus special appearances by The Laurie Berkner Band, The Fresh Beat Band, and even a few surprise cameos. John Leguizamo will need YOUR preschooler's help to make sure the show goes on!

Cast

John Leguizamo

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Donovan Patton

Joe/Bot (voice)

Jon Beavers

Twist

Thomas Hobson

Shout

Shayna Rose

Marina

Yvette Gonzalez-Nacer

Kiki

Justin Bieber

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Phil McGraw

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Colbie Caillat

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Wyclef Jean

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Sofie Zamchick

Linny (voice)

Teala Dunn

Tuck (voice)