Chris Stapleton, Luke Bryan, Lambert set for ACM Awards

In this Dec. 2, 2015, file photo, Chris Stapleton performs at the 2015 Artists of the Year Show at Schermerhorn Symphony Center in Nashville, Tenn. Chris Stapleton dominated at the Grammys and the Country Music Association Awards, but will he repeat at the Academy of Country Music Awards on Sunday, April 3, 2016? Stapleton is the leading nominee with seven, but he's not up for the top award: entertainer of the year.