The Academy of Country Music revealed its nominees for album of the year on Thursday morning (March 5) in Nashville. The nominees include Jamey Johnson's That Lonesome Song, Montgomery Gentry's Back When I Knew It All, George Strait's Troubadour, Taylor Swift's Fearless and Carrie Underwood's Carnival Ride. Although the rest of the nominees were announced on Feb. 11, the album nominations were delayed due to a revision in the qualifications. Previously, albums had to sell 300,000 copies to be considered, but that is no longer the case. The ACM Awards will be held in Las Vegas on April 5.