Wondering how you can make a difference this holiday season? Matt Damon goes undercover as Santa Claus in today's "You've Got..." video to encourage kids to use their Christmas wishes wisely and help those who need clean water.



Damon, along with co-founder of Water.org, Gary White, have previously shared their cause with the Huffington Post audience and in November we helped kick start their clean water movement with the launch of a new section of the Huffington Post, HuffPost Water. Dedicated to giving coverage to the cause, the doers, the solutions, and the discourse that is needed to change the world, HuffPost Water will help contribute to the creativity, innovation, and collective action that will allow us to achieve universal access to water and sanitation.

To find out how you can help the movement visit HuffPost Water or Water.org.