'2 Legit 2 Quit'
MC Hammer was already on a downward trajectory when he released "2 Legit 2 Quit" in 1991, but that didn't stop him from dropping millions on a music video that featured cameos from James Brown, James Belushi and a dozen professional athletes as well as a knock at Michael Jackson. Hammer was so deluded at this point that he thought he was on the verge of unseating as the King of Pop. Anyone that saw the videos remembers it mainly for the "2 Legit 2 Quit" hand gesture they show repeatedly. It was ubiquitous for a good six weeks in late 1991, and has been effectively banished from the planet ever since.