About American Idol Season 20, Episode 7 : Hollywood Week: Genre Challenge

The search for the next superstar continues as "American Idol" kicks off its iconic Hollywood Week, with some of the most prolific alums in "Idol"'s 20-year history returning to mentor the contestants, including Jordin Sparks, David Cook, Lauren Alaina, Ruben Studdard, Chayce Beckham, Lee DeWyze and Haley Reinhart. Fan favorites from auditions will then take the stage for the Genre Challenge to sing their hearts out and impress judges Luke Bryan, Katy Perry and Lionel Richie in hopes of making it through to the next round.