As her career progressed, Lavigne's music evolved to incorporate more diverse influences. Her third album, "The Best Damn Thing" (2007), showcased a transition towards a more mainstream pop sound, featuring elements of power pop and electronic music. Her subsequent albums, including "Goodbye Lullaby" (2011) and "Avril Lavigne" (2013), continued to blend pop-punk with other genres such as pop rock and country.
Overall, Avril Lavigne's music is primarily classified within the pop-punk and alternative rock genres, but it also incorporates elements of pop, punk rock, post-grunge, and country, demonstrating her versatility as an artist.