What did Jimmy have in store for this celebrity guest? Why, a game of Water War, of course.
The name of the game: each turns over the top card in their deck and the person with the higher card gets to throw a full glass of H2O in the other's face.
Lindsay dominated, losing only the first round and getting her face soaked and just a little on her vintage dress before winning the next three rounds and soaking the host. Oh yeah, the winner also gets to pull out the Super Soaker and blast the loser as well.
"Why is this happening!" Fallon exclaimed after he lost his third hand in a row.
"'Cause i have OWN on my side," Lindsay replied, referring to her new docu-series.