There's something about characters from our childhoods rapping to sick beats that is so entertaining. A few weeks ago, someone made a Dinosaurs-Notorious B.I.G. mashup [1], and now, courtesy of YouTube user isthishowyougoviral [2], the Muppets have taken on Digital Underground's 1990 hit, "The Humpty Dance." It's the same person who brought us the Muppets singing Beastie Boys [3] and Rowlf's version of Biz Markie [4], so you know it's good.