Jason Aldean and Jimmie Allen have signed on to participate in American Idol's All-Star Duets Round with the remaining Top 24 contestants, according to Billboard. On April 4th and 5th, each celeb will be paired with two contestants and sing with each separately. Idol's “411 (All Star Duets and Solos)” will air on ABC at 8 p.m. ET.
Katharine McPhee, Tori Kelly, Ben Rector, Joss Stone, Brian McKnight, Jewel, Incubus singer Brandon Boyd, Maroon 5‘s PJ Morton, Josh Groban and Ryan Tedder will also be performing on the show.
The Top 24 will be whittled down to the Top 16 during live shows, which begin on April 11th.