ALS Ice Bucket Challenge

Kermit takes the challenge.

The ALS Ice Bucket Challenge is an activity involving dumping a bucket of ice water on one's head or donating to the ALS Association. The awareness and fundraising campaign went viral through various social media outlets during the summer of 2014.

The challenge publicly dares nominated participants to be filmed having a bucket of ice water poured on their heads and posting it to social media to raise awareness of ALS. A common stipulation is that nominated people have 24 hours to comply or forfeit by way of having to make a bigger charitable donation to the ALS foundation.

Many celebrities―including Ricky Gervais, Julia Louis-Dreyfus, Martha Stewart, Selena Gomez, Justin Bieber, Justin Timberlake, Jimmy Fallon, the Roots, Horatio Sanz, Macklemore, Carrie Underwood, Kobe Bryant, Lady Gaga, Oprah Winfrey, "Weird Al" Yankovic, John Krasinski, Emily Blunt, Conan O'Brien, and George W. Bush―participated in the challenge.

Muppet participants

• Cookie Monster was nominated by Rachael Ray. He accepted the challenge on August 19, 2014 and challenged Neil Patrick Harris, Maria from Sesame Street, Kid President, Janelle Monáe, and Sesame Street fan MarshalGrover. (video)

• Kermit the Frog was nominated by Vince McMahon. After some delays getting ice to his swamp, he accepted the challenge on August 20, 2014 and challenged his Muppets Most Wanted co-stars Ricky Gervais, Tina Fey and Ty Burrell. (video)