Happy Birthday Derek Hough! Let's Celebrate With Hot Shirtless Photos

The only thing hotter than seeing Derek Hough work his moves on the dance floor,is seeing him walk around shirtless on the Dancing With the Stars set.

To celebrate this hunky male pro's 28th birthday, click through the gallery to see him strutting his stuff on the DWTS set last season. It never gets old! 

Catch the Dancing With the Stars Season 16 finale on Monday, May 20, 2013 at 8 p.m. ET/PT on ABC.