Underwood is an 11-time ACM Award winner who is nominated for Female Vocalist of the Year. Urban is an 8-time winner up for Vocal Event of the Year for "Raise 'Em Up" with Eric Church.
Church and Chris Stapleton lead the pack with five nominations each, including Male Vocalist of the Year and Vocal Event of the Year. Cam, a first-time ACM Awards nominee, is up for four awards, including New Female Vocalist of the Year.
Underwood came to fame by winning American Idol Season 4 and last released Storyteller in October. She kicked off her accompanying tour Jan. 30, and will bring the venture to a close May 30 in London, Canada.
Urban, who shares two daughters with his wife, actress Nicole Kidman, last released Fuse in 2013 and will drop his ninth studio album, Ripcord, this year. He also serves as a judge on Fox reality competition American Idol, which is in its 15th and final season.