The group includes a son of a Backstreet Boy and 2 singers who have been finalists on ‘The Voice’ in the last few years.

Jelly Roll encouraged the remaining 42 singers as they paired up for "Idol's" head-to-head round. He also brought in special guest Brandon Lake.

Last night on American Idol, Canaan James Hill, Gaby Samone, Mattie Pruitt, and Zaylie Windsor advanced to the Top 24 after ...