First it was Puff Daddy. Then it was P. Diddy. Now it's just Diddy. The hip-hop mogul may be one of the most ambivalent name-changers in the entertainment industry (sometimes he even reverts back to his given name, Sean Combs), but he is by no means the first. Over the years, many artists have either officially or unofficially shortened their monikers to just one name: Beyoncé, Björk, Bono, Fabio, Jewel, Liberace, Madonna, Morrissey, Oprah, Seal, Sinbad and Usher, just to name a few. Word has it that Lindsay Lohan is even thinking about following suit; her mother, Dina Lohan, recently told the blog PopEater that her daughter was planning to drop her last name. So far, only Prince has become a squiggle.