Goodbye Lullaby is the fourth studio album by Canadian Avril Lavigne. It was released on March 2, 2011 through RCA Records.[1] 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.[2] The album is a lot more personal and softer than her three previous albums, Let Go, Under My Skin and The Best Damn Thing.[3]