Mark Ballas and Derek Hough: Birthday Boys!

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Mark Ballas and Derek Hough partied the night away with friends in Las Vegas Friday night, the former celebrating his 22nd birthday - and Dancing with the Stars title this season - while the latter was honored for turning 23 on May 17.

"I was just there to guide her along this fantastic journey and what an adventure it's been," Ballas said about his run to the title with partner Kristi Yamaguchi. "She definitely deserved to win."

Hough gave his friend more credit, saying Ballas "110 percent deserved to win it. He worked harder than anyone."

Dancing Pals

Mark Ballas and Derek Hough: Good dancers, great friends.

Derek, of course, has been working hard at keeping his relationship with Shannon Elizabeth a secret; suffice it to say, however, the cute dancer has failed in this regard.

While the two haven't acknowledged a relationship, they were spotted sneaking a few smooches at a dinner earlier in the evening.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.