I was completely surprised to read the lyrics to this song today and find out they're completely different than what I thought (and much better)! Mind you, I bought this album when it was released.
I thought they said something to effect of:
What songs have you guys made lyrics up to only to find out they're something entirely different?
The entirety of One Week by the Bare-Naked Ladies.
Not me, but many people thought in Drunk in Love, by Jay-Z and Beyonce, Jay-Z was saying "Eat the Cake, Anime", when in reality he's saying "Eat the Cake, Anna Mae." Anna Mae is singer Tina Turner's real name. In a scene in a movie named after her hit, "What's Love Got To Do With It", Tina goes to a restaurant to celebrate a success. Her abusive husband, Ike Turner, buys her a cake that Tina does not want to eat, and Ike shoves it in her face, screaming the line that Jay-Z references, before slapping Tina's friend when she tries to defend her.
Obviously controversial.