Pop music superstar Adam Lambert will appear on the April 13 edition of FOX’s American Idol and act as mentor to the show’s remaining top contestants, according to EW.com.
Lambert appeared in the L.A. production of the musical Wicked before he became a contestant on season 8 of American Idol, in which he was runner-up to winner Kris Allen.
Last year, Lambert released his first CD,For Your Entertainment.
