“507 (Hollywood Duets Challenge)” – Hollywood Week continues as fan favorites form dynamic duos and hit the Hollywood stage for the Duets Challenge. Platinum Ticket winners handpick their duet partners and rejoin the competition in hopes of making it through to the next round. Judges Luke Bryan, Katy Perry and Lionel Richie are faced with tough decisions that will determine the fate of this season’s aspiring superstars. Emmy® Award-winning host and producer Ryan Seacrest hosts “American Idol,” SUNDAY, APRIL 3 (8:00-10:00 p.m. EDT), on ABC. (TV-PG, L) Watch episodes on demand and on Hulu the day following their premieres.