I don't know if this is too common, but back when Taylor Swift's "Blank Space" first came out, there were a lot of people who thought "Got a long list of ex-lovers" was "Go tell my Starbucks lovers."

A friend of mine in high school used to mishear lyrics all the time. She thought "There's gonna be a heartache tonight," was "There's gonna be a party tonight," and she thought "Our love's in jeopardy, baby, ooooo," was a follow up to an even older song, "I shot the sheriff, but I did not shoot the deputy," because she heard it as, "I shot the deputy, baby, oooooo." As in, the singer repented and decided to confess that he had, in fact, shot the deputy as well as the sheriff.