Glen Campbell, left, Reid Perry, center, and Blake Shelton perform during the 54th annual Grammy Awards on Sunday, Feb. 12, 2012, in Los Angeles. Campbell, who announced last year that he is suffering from Alzheimer's disease, was one of several musicians honored by the Grammys for lifetime achievement. (AP Photo/Matt Sayles)
Read the article: Sunday Grammy broadcast was 2nd largest for awards show in history (VIDEOS)
