He joins the ALS Ice Bucket Challenge.
Justin Timberlake has become the latest celebrity to take party in the ALS "Ice Bucket Challenge" and his attempt might just make you feel a bit chilly.
If you've noticed a lot of people doing this in recent weeks, it's because they're all trying to raise awareness for ALS, better known as Lou Gehrig's disease.
After completing the challenge, people are meant to nominate friends that they want to be involved. If they fail to complete the challenge in 24 hours, they have to donate money.
In his attempt, Justin said he was accepting the challenge on behalf of "Patrick and Rescue The Dog from Boston" and went on the pass the challenge to Jimmy Fallon, host of The Tonight Show and a close friend of Justin's, and Fallon's house band The Roots.
Accompanied by his tour crew, Justin's attempt is incredible.