Girlfriend is a song by Avril Lavigne off of her "pop" album, The Best Damn Thing.
Song meaning Edit
Avril Lavigne is jealous of this girl going out with her ex-girlfriend so she makes a song related to that.
Music video Edit
It was related to the song. Yeah, it didn't win any awards or anything. It's just one of the most viewed videos on YouTube right now, is all.
It got #1 in a lot of places, and hit the top 3 in many others that it charted in.