ALS Ice Bucket 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. It went viral throughout social media during the summer of 2014.

The challenge dares nominated participants to be filmed having a bucket of ice water poured on their heads. A common stipulation is that nominated people have 24 hours to comply or forfeit by way of a charitable financial donation.

Many celebrities - including 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 (video)
 * Kermit the Frog (video)