Just a week after she denied reports that she had surgically enlarged her breasts, Audrina Patridge showed off he ample assets poolside in Las Vegas on Sunday.

The former The Hills star put it all on display in a simple skimpy black string bikini which she partially covered with a sleeveless denim shirt.

PHOTOS:  Audrina Patridge Shows Off Her Bikini Body In Las Vegas

The reality starlet was joined by on-off boyfriend Corey Boham at the Wyclef Jean concert by the pool at the Hard Rock Hotel & Casino.

Audrina and the Australian pro BMX biker have broken up and got back together several times since they first met in 2008.

PHOTOS: Behind The Scenes Of Audrina’s Latest Bongo Ad Campaign

Audrina explained last week why there have often been erroneous rumors she's had plastic surgery to enhance her chest. "I have this chest problem. My bone right here, it's higher on this side. It's Pectoralis something. So I've always struggled with that," the former Hills star said.

Audrina's own reality show, 'Audrina' was canceled after only one season following dismal reviews when it premiered in April.

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Audrina Patridge has a chest deformity which makes her breasts look like they are different sizes, RadarOnline.com can report.

The former Hills star – who has appeared in numerous bikini photo shoots - has a problem with her chest bone which affects the appearance of her breasts.

When quizzed on whether she’d had breast enhancement surgery, she told iPad news provider The Daily: "I don't like to talk about that. Well, see I have this chest problem. My bone right here, it's higher on this side? It's pectoralis something. So I've always struggled with that. You could see they look different sizes all the time."

There's nothing like having two guys fight for your attention.

Reality star Audrina Patridge's on – off - on boyfriend Corey Bohan is once again showing off his bad boy credentials - this time by threatening a guy Patridge dated during the time the volatile couple had split.

PHOTOS: Audrina Patridge's Sizzling Hot Bikini Shoot

One day before a new episode of Patridge’s reality show Audrina aired, which showed her getting up close and personal with polo star Nic Roldan, Boham lashed out via Twitter and threatened his competition.

Gorgeous Audrina Patridge stripped down to a bikini for the premiere of her new VH1 reality show, Audrina, on Sunday.

In the debut episode, we got to see many different aspects of her life, from glamorous photoshoots to family dinners that get a tad heated.

In one sequence, we saw the 26-year-old beauty from The Hills show off her sexy body in a steamy bikini shoot for her very own calendar in Palm Springs, California (And there’s plenty more where that came from here).

Audrina Patridge's ex-boyfriend Corey Bohan is making no secret about how he feels about The Hills star since their recent break-up, RadarOnline.com has learned.

The Australian BMX racer went on an expletive-filled rant about his former love on Twitter, and while most of Bohan's angriest messages slamming the reality star were deleted, his final tweet made his feelings loud and clear:

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"A girl that's told yes by everyone surrounding them grows up to be a heartless closed off insecure individual," Corey wrote.

In an earlier message, the tattooed tough guy lamented: "Time 2 pick up the pieces & stop being so sad! Some woman will always be empty & rotten from the inside out. U cant love a heartless woman."