Until rather recently, stage names were just like real names, but slightly catchier — usually to make it easier for fans to remember. Anthony Benedetto became Tony Bennett, Dino Crocetti became Dean Martin and Eleanora Gough became Billie Holiday. But then something happened. Somewhere on the road between disco and hip-hop, stage names became alter egos, giving entertainers entirely new identities. We created a list of some of our favorite stage names. Click through to Bing to see if you can guess the real names behind the professional ones.