"Complicated" is Avril Lavigne's first single, released in 2002 from her debut album, Let Go. The single reached number two on the Billboard Hot 100, becoming Lavigne's first top-ten single. The single also reached number three in the United Kingdom and number one in Spain, Australia and Mexico. Based on its chart performance, the song is also Lavigne's second most successful single, and was also one of the most successful releases of 2002. The song was ranked at number 197 in Blender magazine's "The 500 Greatest Songs Since You Were Born". The song is also considered to be her signature song. The song also has a parody by "Weird Al" Yankovic called "A Complicated Song". Avril recorded this song in one take during recording sessions according to sources.
Complicated is the third and internet only single from The Cliks' debut studio album, Snakehouse. It was released on iTunes on January 30, 2007.
