AM makes Richie extra mad

Nicole Richie wants the world - or at least its paparazzi - to know she's happy with her new beau, one-time reality "star" Brody Jenner. But the underfed ingenue had her hackles up when the new girlfriend of her former fiancé, DJ AM, walked into her 25th-birthday festivities. She was celebrating at Teen Vogue's Young Hollywood party at the Sunset Towers Hotel with friends who included Mischa Barton and Rachel Bilson.

According to a spywitness: "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 Generation Y's chosen platform for self-humiliation - her interests include "flossing" and "smoking cigarettes! Ya Know!!!" Her stated occupation is "unicorn fluffer."

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