Los Angeles, May 12, 2006 – No, Brooke Shields is not suffering from postpartum dementia this time; but apparently she didn’t get the memo that the Race to Erase MS gala on Friday was not a costume party. Was this a Bridget Jones’ Diary-style trick by her nemesis, Tom Cruise? Natalie Cole also dressed for the disco fever-themed bash, but she was one of the evening’s performers.

Attendees included lots of young Hollywood types, including arch enemies Paris Hilton and Nicole Richie, each backed up by her second-in-command, Kimberly Stewart and Lindsay Lohan, respectively. Mischa Barton sat this one out, since the Race to Erase is the brainchild of Nancy Davis, her ex, Brandon’s mom. Gay divorcee Sophia Bush was jolly despite her ex Chad Michael Murray’s recent engagement to a teenager. Kristin Cavallari wore a $500,000 Neil Lane ring, but is not engaged.

Sharon Osbourne divided her time between good causes this evening, accompanying her daughter, Kelly, to the Race to Erase gala, and also joining Husband Ozzy at a MusiCares benefit.