The Keeping Up With the Kardashians star -- who turns 34 on April 18 -- has worked hard to bounce back from two pregnancies
A little over four months after Mason's birth, the new mom was back in a bathing suit for her 31st birthday party at MGM Grand's Wet Republic pool in Las Vegas, Nev. She looked great -- but in 2012, she admitted to Us Weekly that she put too much pressure on herself to lose the baby weight in record time. "I was working out and not eating enough," she told Us. "I definitely pushed myself too hard."
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