But one bucket is so last week. When Demi Lovato stepped up to the plate, she took on not one, not two, not four buckets, but FIVE BUCKETS!! After bravely running the gauntlet, Demi issued a handful of challenges to five other celebs: Christina Perri, Jonas Brothers guitarist John Lloyd Taylor, JoBros manager Phil McIntyre, actress and half-sister Madison De La Garza and Wilmer Valderrama.
And here's the thing: It's working. Since July 29, the movement has raised more than $5.5 million for the ALS Association, compared to the $32,000 raised during the same period last year.
Here are our 17 other favorite celeb challenges:
1. Emmy Rossum
2. Elizabeth Banks
3. Jimmy Fallon, the Roots, Rob Riggle, Horatio Sanz and Steve Higgins
4. Adam Levine, Blake Shelton and Carson Daly
5. Lance Bass
6. Pretty Little Liars' Sasha Pieterse
7. All These NFL Players And Coaches
8. Matt Lauer
9. Keith Urban
10. Johnny Weir
11. Mario Lopez
12. Nick Lachey
13. Andy Cohen