Nicole Richie had her oversize white Balenciaga bag in hand and sunglasses on as she arrived at LAX this morning. She was up early after a big night out celebrating her 30th birthday. Nicole partied with friends, including Ashley Olsen and Samantha Ronson, late into the night at the Regent Beverly Wilshire. Her husband Joel Madden was also by her side, and Nicole shared a sweet picture of them during the bash on Twitter. Earlier in the day Nicole met up with a few girlfriends for lunch at Cecconi, where she was gifted with Mrs. Fields cookies, among other surprises.