Goodbye Lullaby is the fourth studio album by Canadian singer-songwriter Avril Lavigne. It was released worldwide on March 8, 2011 through RCA Records. Recording sessions for the album began in November 2008 and continued over a period of nearly two years, concluding in October 2010. Goodbye Lullaby is a primarily a pop rock album and is considered a more introspective record from Lavigne in comparison to her previous material, consisting mainly of stripped down instruments such as the piano and acoustic guitar. Lavigne assumed an integral role in the album's production and co-wrote every original track on Goodbye Lullaby, as well as collaborating with several producers including Max Martin, Shellback, Butch Walker, and her ex-husband Deryck Whibley. Goodbye Lullaby is Lavigne's third and final studio album with RCA, following The Best Damn Thing (2007) and Under My Skin (2004)

Avril Ramona Lavigne is a Canadian singer-songwriter. She is considered a key musician in the development of pop-punk music, as she paved the way for female-driven, punk-influenced pop music in the early 2000s. Her accolades include eight Grammy Award nominations, among others.