Ice Bucket Challenge Video: Celebrities Like Britney Spears, Kerry Washington, Chris Hemsworth Dump Freezing Water Over Heads for ALS: Watch Part 2

The fun (and freezing) continues! More celebrities than ever have joined in on the ALS Ice Bucket Challenge to raise awareness and money for Lou Gehrig's disease. The association's national office has raised a staggering $15.6 million since July 29 -- and there's no sign of stars throwing in the towel just yet. (Just grabbing one to keep warm!)

PHOTOS: Celebrity charity

Britney Spears

Britney Spears
Credit: Courtesy Britney Spears

The latest to join the cause include Chloe Grace Moretz, Hilary Duff, Jimmy Kimmel, Julia Louis-Dreyfus, Britney Spears, Miles Teller, and Kate Upton. Some stars -- including Miley Cyrus, Anna Kendrick, and Kerry Washington -- have been particularly memorable with their videos.

Julia Louis-Dreyfus

Julia Louis-Dreyfus
Credit: Courtesy Julia Louis Dreyfus

Cyrus enlisted her brother Braison, but noted that it's more important to donate $100 to the organization than to get drenched with freezing water. Her suggestion instead? No ice, just rice!

PHOTOS: Celebrities as superheroes

In true Kendrick fashion, the Pitch Perfect actress couldn't help but crack a joke before getting wet. "Also to conserve water I didn't shower today. We can cut that part out, right?" she said.

Washington, meanwhile, took one for the team on the set of Scandal while wearing her staple Olivia Pope pink coat. "Okay, I'm accepting two buckets -- one on behalf of the cast of Scandal. We don't want you to know who's shooting tonight. And two, for my boss Bob Iger who challenged me."

Kerry Washington

Kerry Washington
Credit: Courtesy Kerry Washington

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Not to be outdone by the ladies, several Hollywood hunks also got in on the fun. Chris Hemsworth, Dwayne "The Rock" Johnson, Ashton Kutcher, Wilmer Valderrama, One Direction's Niall Horan, and Tom Hiddleston all stepped up to the challenge.

Lastly, some stars just couldn't face the ice bucket alone. The cast of Grey's Anatomy, Hart of Dixie, and The Voice's Blake Shelton, Adam Levine and Carson Daly made it a team effort. Hugh Jackman, Rooney Mara, Garrett Hedlund and the crew of their film Pan taped their own segment and pals Jessica Alba, Gavin Rossdale and Nicole Richie got soaked together thanks to Gwen Stefani

Grey's Anatomy cast

Grey's Anatomy cast
Credit: Courtesy Ellen Pompeo

Other stars who took the time to donate and/or post an ice bucket clip were Allison Williams, Ashley Benson, Calvin Harris, Cindy Crawford, Eva Longoria, Gisele Bundchen, Kaley Cuoco-Sweeting, Lily Collins, Seth Meyers, Mickey Rourke, Rita Ora, Tara Reid, Shakira, and Vanessa Hudgens.

Alba, Rossdale, Richie

Alba, Rossdale, Richie

PHOTOS: Stars -- they're just like Us!

Watch Us Weekly's second Ice Bucket Challenge video roundup now!

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