Celebs are raising money and awareness for Lou Gehrig’s disease with the Ice Bucket Challenge. It involves dumping a bucket of ice water on your head and challenging someone to do the same or make a donation to ALSA.org.

Justin Timberlake, Jimmy Fallon, Matt Lauer, Facebook founder Mark Zuckerburg and more have done it. Watch them below, join in and challenge someone today!

Justin Timberlake and Jimmy Fallon

Matt Lauer

Facebook founder Mark Zuckerburg

Martha Stewart

Dallas Cowboys’ Dez Bryant and Tony Romo

Extreme Ice Bucket Challenge

Elizabeth Banks