After being called out by his new Apple business partner, Tim Cook, last week, Dr. Dre stepped up to the plate and completed the ALS Ice Bucket Challenge yesterday. Dre took the challenge to the next level though, as he set up an entire mechanism to drop a pretty insane amount of freezing water on his head. Dre then passed the challenge on to Eminem, Snoop Dogg, and Kendrick Lamar, who now have 24 hours to complete the task. Though, as you can see from Eminem's tweet below, he is more than ready.