Nicole Richie Gets Into Late-Night Fistfight

Nicole Richie has gone from pushing strollers to throwing punches. The pint-sized mom reportedly found herself in a late-night brawl with a female partier in the valet line outside the Hard Rock Hotel in Las Vegas, where she had been dancing in drinking with her boyfriend Joel Madden, his Good Charlotte bandmates and biker Carey Hart.

Things got so bad, reports TMZ, that Nicole had to be escorted off the premises by hotel security. Nic's rep denies the rumors, saying "she was in Vegas but there wasn't an altercation of any kind involving her."

Suuure there wasn't. Nicole may be on her best behavior now that she's got little Harlow to take care of, but we know there's still a feisty diva lurking beneath her reformed-girl facade. Nothing wrong with letting her come out and play once in a while, Nicole!