Singer Avril Lavigne is facing legal action by members of 1970s rock band The Rubinoos, who claim she has copied one of their songs.
Avril Lavigne is married to Deryck Whibley, lead singer of Sum 41
Songwriters Tommy Dunbar and James Gangwer allege Lavigne's Girlfriend was lifted from their 1979 song I Wanna Be Your Boyfriend.
Lavigne's spokeswoman declined to comment about the allegations.
In a statement, Dunbar said: "We are not so naive as to chalk it up to some sort of cosmic coincidence."
He added: "The lyric, the metre, the rhythm - they're identical."
The case will be heard in Oakland, California, on 28 August.
New wave group The Rubinoos toured and recorded from 1975 to 1983 and had a hit with a cover version of Tommy James and the Shondells' I Think We're Alone Now.
They also wrote the theme song for the movie Revenge of the Nerds.
Lavigne, best known for hits such as Complicated and Sk8er Boi, recently scooped the award for favourite Canadian artist at the MuchMusic Video Awards in Toronto.