In a surprising holiday ensemble, Mariah Carey wowed fans at NBC's Christmas tree lighting ceremony at Rockefeller Center while leaving little to imagination. The curvaceous singer and new mom wore a tight low-cut red satin-embellished dress with sparkly silver peep toe pumps. She was joined on stage by a very happy Santa and sang "All I Want For Christmas Is You."

Check out Mariah's surprising holiday outfit and more "a little too tight" looks above!

You can watch the entire "Christmas in Rockefeller Center" airing tonight at 8/7c only on NBC.

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Photo Credit: Jamie McCarthy, WireImage/Getty Images