Goodbye Lullaby is the fourth studio album by Canadian Avril Lavigne. It was released on March 2, 2011 through RCA Records. Her first single off the album was "What the Hell" which was released on January 10, 2011. The second single, "Smile", was released on April 11, 2011. The album is a lot more personal and softer than her three previous albums, "Let Go", "Under My Skin" and "The Best Damn Thing".