The ice bucket challenge involves exactly what you think it entails.
You, or a friend, is fill a bucket with ice cold water and dump it over your head, and then donate $10 to the ALS Foundation. Afterwards, you nominate a few friends to do the same within 24 hours. If they do not complete the challenge, they are supposed to donate $100 to ALS. These challenges are then recorded and shared all over social media.
While this challenge has gained the attention of nearly everyone, it has struck a chord with celebrities. From Lady Gaga to former President George W. Bush, celebrities are joining the ice bucket craze left-and-right, all to help the cause.
Here are five of the best celebrity videos, so far.
1. Chris Pratt
2. Oprah Winfrey
3. Bill Gates
4. Cristiano Ronaldo
5. Anna Kendrick


















