Nicole Richie has denied reports she participated in a ruckus with another woman at a Las Vegas hotel.

The new mother reportedly had to be escorted from Sin City's Hard Rock Hotel and Casino following an argument with an unidentified women over a taxi while spending the weekend in Vegas.

Nicole Richie with friends at the Hard Rock Hotel & Casino

But a spokesman for the 26-year old tells TMZ: "She was in Vegas but there wasn't an altercation of any kind involving her."

Do you think her spokesman is covering up the truth? Is this the return of bad girl Nicole? Be sure to leave your comments below.