In 2008, the song became the most viewed video on YouTube, and was the first video on the site to reach 100 million views.
The song's accompanying music video, directed by The Malloys, sees Lavigne portraying three alter-egos, with all of them fighting over the same guy.
"Girlfriend" was certified multi-platinum in Australia and the United States.
The song was among the top-selling songs of 2007, with over 7.3 million worldwide sales.
Rolling Stone ranked the song number thirty-five on their list of "Top 100 Songs of 2007" list.