"The Best Damn Thing" is the fourth and final single from Canadian singer-songwriter Avril Lavigne's third studio album The Best Damn Thing. The song was written by Avril Lavigne and Butch Walker. It was first released on June 13, 2008 in Germany. It was released to Australian radio during 2008, and was added to radio countdown The Hot Hits. The song received much airplay in Brazil, where the music video was also released.