Nicole Richie kicks girl out of party

Nicole Richie wants the world to know she's happy with her new beau, one-time reality "star" Brody Jenner reports NYDN.

Nicole Richie was celebrating at Teen Vogue's Young Hollywood party at the Sunset Towers Hotel with friends who included Mischa Barton and Rachel Bilson.

Once her ex, DJ AM's new girlfriend showed up Nicole Richie stretched her star muscle.

According to a spy: "When DJ AM's new girlfriend [Lauren Hastings] showed up, Nicole had security mysteriously 'clear her area.'"

And Lauren suddenly found herself on the wrong side of the velvet rope.

Hastings, a 22-year-old model, had been observed shadowing AM (aka Adam Goldstein) during the MTV Video Music Awards.

According to her MySpace page her interests include "flossing" and "smoking cigarettes! Ya Know!!!"

Her stated occupation is "unicorn fluffer."