“Smile” is a song by Canadian recording artist Avril Lavigne, taken from her fourth studio album Goodbye Lullaby. Written by Lavigne with Max Martin and Shellback, and produced by Martin and Shellback, the song is a pop punk track. The lyrics find the singer expressing her gratitude for a special person in her life. “Smile” was released on April 11, 2011 to Australian radio stations and then on May 17, 2011 to U.S. radio as the second single. The song received favorable reviews from music critics, who described the track as a “sassy and catchy pop song”. A music video directed by Shane Drake was filmed on April 21, 2011 and was released on May 20, 2011. It has charted inside the top-forty on the Australian, Japanese and New Zealand charts.