Kristen Stewart wins the ALS Ice Bucket Challenge celeb video of the day, because not only did she do it with dirty bath water, but she dunked her head in a bucket before having it dumped all over her!

K. Stew, who was challenged by Anne Hathaway, was joined by her Equals co-star Nicholas Hoult and pal Scott Fahrendorf, and before the chaos began, she said, "Hathaway, get this. This is a f*cking real challenge." She wasn't kidding! Hoult and Scott Fahrendorf dumped a trashcan of water on the Twilight starlet, who then nominated Jenny Lewis, Jackie Weaver and Brie Larson.

After the 24-year-old actress was completely soaked, she said, "In good faith you must believe this was all done with dirty bath water. Please be considerate of California water conservation." Glad someone finally said it! And is it just us, or is she looking awfully chummy with Mr. Hoult, who recently split from his longtime lady love Jennifer Lawrence?

P.S. For all the Shia LaBeouf fans out there, he did one too ... you gotta watch it!