Lambert, who was first runner-up on last season's edition of FOX's American Idol, recently released his first CD, For Your Entertainment. He has appeared on stage in Wicked.
In addition, as previously reported by TheaterMania, Groovaloo Freestyle, the dance musical now at the Union Square Theatre, will also make and appearance on the show. Groovaloo is created by Bradley Rapier and Danny Cistone, and directed by Cistone. The piece features a 14-member cast, and is based on the dancers' own experiences. It combines displays of physicality, a musical score, and spoken word poetry.