Calum Best and Kimberly Stewart?!

Sure looks that way - we spotted the pair hurrying out of Il Sole last night!

Then again, with Calum having flown in just to show up to Lindsay's 21st (and with Lindsay apparently claiming she now has a boyfriend), and Kimberly said to be dating rocker Tommy Lee, maybe they're "just friends". And maybe that's what Lindsay will say when Calum asks her about these shots of her flirting with A.J. Lamas!