Nicole Richie has refuted reports she was recently involved in an altercation in a Las Vegas hotel whilst waiting for a valet to fetch her car.Reports emerged that the 26-year-old professional socialite had been escorted from the city's Hard Rock Hotel and Casino following an argument with an unidentified women over a taxi while spending the weekend in Sin City.A spokesman for the star, who had been partying with her rocker fiancé Joel Madden; "She was in Vegas but there wasn't an altercation of any kind involving her."

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