The Insider.com

It's no secret that Justin Bieber's presence can magnetize any room, and that's just the case when he surprises a room full of aspiring young dancers on the Disney Channel special "Make Your Mark: Shake It Up Dance Off."

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High-pitched screams bop around the room as the pop sensation spontaneously emerges from a doorway to the surprise of the talent show competitors. The young dancers don ear-to-ear smiles as Bieber then shakes hands with them.

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After coming back to earth from Bieber's entrance, the dancers will battle for a chance to dance in an episode of the Disney Channel sitcom Shake It Up. In addition to Bieber's appearance, Olympic gold-medal gymnast Gabby Douglas will also make an appearance on the show.

The special is hosted by Shake It Up stars Roshon Fegan and Debby Ryan and has a star-studded group of judges lined up in singer Cher Lloyd, choreographer Rosero McCoy, and Dancing with the Stars' professional dancer Derek Hough.

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While Bieber won't be performing like he did in 2011 on Disney Channel's So Random!, the show will include performances from Austin & Ally's Ross Lynch and Shake It Up's own Bella Thorne and Zendaya.

"Make Your Mark: Shake It Up Dance Off" airs Friday at 8 p.m. on the Disney Channel, with the results show following on Sunday.