LLohanWater082208_01_X17.jpgLindsay Lohan LLohanWater082208_02_X17.jpg Lindsay Lohan might have been in high spirits yesterday afternoon - but she got even happier by the time the night wrapped up!

We caught Lindsay hanging around outside the W Hotel after dancing up a storm during her gal pal Samantha Ronson's DJ set. If the giant smile Lindsay's sporting is any indication, Linds had herself a fine old time fooling around with Sam inside - one of our spies heard she was "all over Samantha" all night!

Of course, our spy also heard Lindsay was drinking inside - and we did catch Lindsay holding a whole bunch of water. Hopefully Lindsay was just rehydrating after a dance marathon - we'd hate for her to fall off the wagon!