If you have to become a year older and you have to do it in front of a camera, you might as well do it topless!
The duo where joined by friends like Mark Ballas, Shoshana Bush, Ashley Roberts and Samuel Larson for a joint birthday party put on by Ciroc, which doesn't seem like a bad way to celebrate!
Derek definitely got the better end of the deal though, getting to enjoy the pool while having Cheryl cut the cake! Ha!
Happy birthday, guys!
[Image via Faye Sadou