Ice Bucket Challenge

The 2014 phenomenon returns to raise ALS funds and awareness, and Renee Zellweger and Justin Bieber are two of the first high-profile folks to douse themselves.

Last night's 'Tonight Show' was just chock-full of surprises!

Check out today's Ice Bucket Challenge roundup to watch some of your fave celebs take on the challenge for ALS awareness!

Check out the Ice Bucket Challenge roundup to watch 30 celebs who took on the challenge for ALS awareness!

Having previously been called out by The Band Perry and I'm sure others, Coach Nick Saban accepted their challenge and got the entire football team involved as well!

As the ice bucket challenge continues to charge on across social media, we've seen many celebrities and musicians take part in the ice bucket challenge.

The challenge, you have 24 hours to pour a bucket (not just a cup) of ice-cold water over your head for ALS awareness or make a minimum donation of $100 to the cause. Sure, I'll accept the challenge in the name of ALS or Amyotrophic lateral sclerosis, which is also known as Lou Gehrig’s disease.

The latest celeb to take on the ALS Ice Bucket Challenge? Justin Timberlake!