What was the first album to have a parental advisory sticker?

The answer is: Banned in the U.S.A. While there had been some level of warning labels applied to music before, it wasn't until 1990 that the Parents Music Resource Center got the record industry to agree to a standardized warning label — although, standards around what warranted a label were never really put in place.2 Live Crew was kind of an obvious group to get the first album with that classic black-and-white sticker attached to it. Its effectiveness has been spotty at best, with some wondering whether it actually improved sales in certain cases.Source