Let's face it, in this town, when you're skinny, you're usually happy -- and if you've lost weight because you're on a "divorce diet," you're probably still happy that at least one good thing came out of your failed marriage.

But in the case of Mischa Barton, who isn't in the throws of a messy breakup, her weight loss hasn't put a smile on her face. Or maybe it's just the paparazzi who make her frown?

Whatever the case, Ms. Barton and her lovely, well-defined cheekbones, looked spectacular last night as she left dinner on Sunset Plaza with a friend. Now if she'd just smile ...