The latest Facebook trend that's been going around is dumping ice cold water on your head to raise awareness for ALS AKA Lou Gehrig's disease.
And Justin Timberlake has joined in.
He posted a video of him and his crew taking the challenge and pouring a bucket of ice water on each of their own heads. And they're pretty excited about it.
Watch the video here!
Nik dishes celeb gossip and hits you with the latest, must see stuff on the web.