Uncle Kracker will release a new album, Happy Hour, on Sept. 15. It's his first release since 2004's Seventy Two and Sunny. Kenny Chesney and Uncle Kracker scored a No. 1 country hit in 2004 with "When the Sun Goes Down." According to Billboard, Uncle Kracker worked with producer Rob Cavallo on the album and wrote two of the album's songs with Nashville songwriter Brett James, who co-wrote "When the Sun Goes Down." Guests include Dave Matthews Band trumpeter Rashawn Ross.