The Canadian singer was baffled when she heard that songwriters James Gangwer and Tommy Dunbar were suing her over the song, which they claim infringes upon their 1979 track I Wanna Be Your Boyfriend, performed by pop band The Rubinoos.
The lawsuit is based on the fact that the Rubinoos' track contains the lyric, "Hey, hey, you, you, I wanna be your boyfriend," and Lavigne sings, "Hey, hey, you, you, I want to be your girlfriend" in her single.
"You may have heard some news that two guys who wrote for some band from the 1970s I have never in my life heard of called the "Rubinoos" are trying to sue me. They have a song called I Want To Be Your Boyfriend that has no musical similarities to the song Girlfriend that Luke Gottwald and I wrote together," Lavigne explained on her Myspace page.
"They claim that a small part of the lyrics are the same and are saying that I took these from them. I had never heard this song in my life and their claim is based on 5 words! All songs share similar lyrics and emotions. As humans we speak one language.
"Off the top of my head, two other songs that I can immediately think of with this type of lyric are "Hey, hey, you, you get off of my cloud" by the Rolling Stones and "Hey little girl I want to be your boyfriend" by the Ramones. Simply put, I have been falsely accused of ripping their song off. Luke and I have done nothing wrong and there is no merit to their claim."