Derek Hough & Samuel Larsen: Shirtless for Ciroc

Dancing With The Stars regulars Cheryl Burke and Derek Hough celebrated a joint birthday party in Los Angeles at a pool party.

The two both enjoy May birthdays and shared a joint birthday cake and festivities provided by vodka label Ciroc.

Also at the event and shirtless is the winner of The Glee Project, Samuel Larsen, who is almost unrecognizable without his trademark long dreads.

Derek has plenty to celebrate this year, with a birthday earlier this month, a win on the last season of DWTS as well as the ability to cultivate perfect washboard abs.