Brain Freeze Challenge is a challenge on YouTube, created by YouTuber, Caspar Lee with more then 5 million subscribers. He invites other YouTubers to sit in a ice tub and asks them questions, once they answer correctly they can get out of the bath. The first Brain Freeze challenge video was posted November 10 of 2014, and is still making them to this day. He has had Joe Sugg (ThacterJoe), Eva Gutowski (MyLifeAsEva), Oli White (OliWhiteTV), Joe Weller, among many others as guests on these videos. Each of these videos individually have about 5,000,000 views each.