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Jessica Simpson flashes hot bikini body in front of party guests in Vegas!

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AP

Whoa, Nelly!

After Simpson fell under the rafters for her weight gain post-break up with Dallas Cowboys QB Tony Romo, this superstar is sporting a supermodel body.

The pop singing sensation flashed a hot bikini body in front of fans in Sin City this week.

As sister Ashlee Simpson rung in her 25th birthday, the star and her sister celebrated out by the pool in the tail-end of summer sun.

After the party, Simpson posted on her Twitter page, “Safaricus! New outfit! Wet republic pool party. Kept secure in the summer heat.”

The 29-year-old blonde bombshell looked happy and well according to onlookers (a recent trend in Jessica Simpson news) and said the star was all about fun, even requesting Beyonce's "Single Ladies" to the DJ, asking all single ladies to dance to the tune.

Fox News quoted a source as saying, “Jessica looked beautiful and very relaxed. She didn’t have any qualms about showing off her body and enjoying the family time."

The star has reportedly hopped back on the workout wagon, working out with personal trainer Mike Alexander

The star tweeted of her workouts earlier this year at the re-start of her fitness program saying, "On my way to work out with my trainer. Every time we have to do squats, he yells at me, 'Get lower like you're in the club!'" 

To see Jessica's new swimwear line, The Jessica Collection, click here.

 
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