Nicole Richie turns 30 today! We're celebrating her big day with a look back at some of her most memorable photos with her best pals. She had the company of one-time BFF
Paris Hilton when they filmed
The Simple Life, and other buds like
Rachel Bilson,
Naomi Campbell, and
Kate Bosworth have been by her side supporting her fashion endeavors. She's one of the best-liked ladies in Hollywood, so celebrate Nicole's big day with a look at her and ...