Blake Shelton, Dierks Bentley, Keith Urban and Toby Keith will pay tribute to one of country music’s legends during the upcoming ACM Honors. They’ll take the stage together to perform a medley of Glen Campbell’s greatest hits. During the ceremony, Campbell will be given the ACM Career Achievement Award. Campbell’s wife Kim will accept it for him. Campbell was diagnosed with Alzheimer’s in 2011. The 10th Annual ACM Honors will be taped on August 30th in Nashville. The two-hour special will air on CBS on September 9th.