ALS ice bucket challenge: Bill Gates, Lady Gaga have done it; will you?

In less than a month when it started, the Ice Bucket Challenge has gone viral on the social media -- from tech moghuls such as Bill gates to mark Zuckerberg, to Lady Gaga to Justin Bieber, everyone is either doing it or wants to do it.

The challenge involves pouring a bucket of ice cold water on yourself and raise awareness about Amyotropic Lateral Sclerosis (ALS), and then challenge someone else to do it. The person who has been challenged has to do it in 24 hours, or donate $100 towards the cause. You are welcome to donate the money even if you complete the challenge.

Here are some images of celebrities taking the challenge for the cause. We start with Lady Gaga dressed in here inimitable style.

Please click NEXT to see celebrities taking the challenge...