Avril Lavigne sang a song.
Her breakthrough single , `` Complicated '' , peaked at number 1 in many countries around the world , as did the album Let Go .	Let Go	Let Go (Avril Lavigne album)	Complicated	Complicated (Avril Lavigne song)
`` Complicated '' is the debut single by Canadian singer-songwriter Avril Lavigne , released in 2002 from her debut album , Let Go .	Avril Lavigne	Avril Lavigne	Let Go	Let Go (Avril Lavigne album)
