From old-school movie stars looking for a memorable way to find fans to pop stars who went for an out-of-this-world new alias, here are celebrities who took stage names when they hit the big time.
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Lady Gaga. Cher. Bruno Mars. Diana Ross. Usher. Bette Midler. Concert headliners have been bringing Vegas audiences to their feet since Liberace debuted at Hotel Last Frontier in 1944.