Turns out, Led Zeppelin’s Robert Plant helped pick songs out for the movie soundtrack.

Director Peter Farrelly revealed that he asked the musician for help on what songs to feature in the film. “I said, ‘Robert, tell me some songs that you listened to in the late ’50s and early ’60s that nobody plays anymore. I want to hear the cool songs to you but that you haven’t heard on the radio in 50 years.'”

Read the full story on Ultimate Classic Rock.