Mark Ballas celebrates his birthday at Liquid Pool.

On Saturday, “Dancing with the Stars” stud Mark Ballas celebrated his 25th birthday Sin City-style at Liquid Pool Lounge at Aria, and was joined by several friends from his childhood, both from London and from Texas. The lively bunch took over the pool area, dancing along to the deejays beats including Deadmau5, Britney Spears, David Guetta and Duck Sauce while enjoying Liquid’s specialty frozen cocktails including the watermelon cooler and flavored mojitos.

After a long day in the heat, Ballas was presented with a disco ball-shaped cake by a bevy of Liquid’s sexy go-go dancers who helped Ballas blow out the candles, while he was surrounded by friends and fellow daytime revelers. Even though girlfriend and “American Idol” starlet Pia Toscano was unable to attend the fete at the last minute, Ballas partied the day away, treating fellow partygoers to an unforgettable afternoon on the Vegas strip, partaking in Nivea for Men’s “Look Like You Give a Damn” special poolside services and massages, noshing on fish tacos, quesadillas and shrimp cocktail. Ballas ended his day at Liquid by throwing his friends in the pool and dancing on his daybed, after indulging in a super soaker fight with champagne-filled water guns.

Ballas continued his birthday festivities later in the evening with a dinner at Union Restaurant & Lounge, followed by a table at Haze Nightclub for Mark Ronson’s deejay performance where he danced on the banquet with friends, enjoyed rounds of Patron shots and happily took photos with adoring fans.

Click on the photos below to enlarge.

Like Haute Living Las Vegas? Join our Facebook page or follow us on Twitter. Want Haute Living Las Vegas delivered to your in box once a week? Sign up for our newsletter.