What does a egotistical pop star have in common with the best basketball player in the world?
What action has united a shirtless CW star with one of the planet's richest men?
The answer to both questions is the same: an untold number of celebrities from across every conceivable industry have come together online to accept the ALS Ice Bucket Challenge.
The act is simple (you douse a bucket of ice cold water over your head) and the cause is important (you help raise awareness for a debilitating disease without any cure) and it's been inspiring over the past few days to see so many famous folks get involved.
Who took the Challenge? Who did these stars then pass it on to next? Watch the following video, find out and go grab your own water bucket, readers. THG challenges you!