Lindsay Lohan certainly had a busy day yesterday -- after doing some shopping, some lunching and some, uh, coffee-ing, Lilo hit the clubs with her gal pal Samantha Ronson.

The pair partied at Villa, with Samantha speeding off with Lindsay in her Porsche at the end of the night. We're glad Sam's driving (Lindsay's track record behind the wheel isn't the best), but we wish she'd slow down!