On the New Year's cruise this year, they had the talent show on the Magic. It is billed as a family talent show. Keep in mind, that it is a showcase of talent, not a competition. At our show it was all kids and teens (including my 12yo DD who played piano and sang), it would have been fun to see some adults though. A couple of days before the show they will anounce in the Navigator about the sign up. Sign up is at the shore excursions desk. Then they will have one run-through rehearsal. Because we had heard about the show before we cruised, and because we weren't sure they would have it during this special holiday cruise, we simply asked one of the cruise director's staff if and when it was going to happen.
Our show included dancers, (if you bring a cd, they will play it for you), singers, hula hoopers, and piano players (electric keyboard). It was really cute.