Hear the similarities between the songs? Prince did, too, which is why he called up Journey's Jonathan Cain and asked for his blessing before releasing what would become his signature song.

Cain recalled going to Columbia Records' offices in Los Angeles to take a call from Prince, who said, 'I want to play something for you, and I want you to check it out. The chord changes are close to 'Faithfully' and I don't want you to sue me." "I thought it was an amazing tune," Cain said, 'and I told him, 'Man, I'm just super-flattered that you even called. It shows you're that classy of a guy. Good luck with the song. I know it's gonna be a hit.'"