Khloe Kardashian Bikini Pictures

Khloe Kardashian and Lamar Odom escaped to Puerta Vallarta, Mexico, this week with friends. The loved-up couple lounged by the pool at their luxury resort on Wednesday, and Lamar beat the heat by stripping off his shirt while Khloe worked on her tan in a rainbow bikini. Their trip south of the border follows a lively weekend in Las Vegas, where the couple kicked off Khloe's birthday celebrations with her sister Kim and Kris Humphries. During their stay in Sin City the Kardashian sisters stepped out for a dinner date in their signature curve-hugging dresses that showed off their assets. Yesterday their famous backsides were back in the news when Khloe posted an X-ray of Kim's lower body, ending rumors Kim has implants. Khloe's sure Kim's body is the real deal but Khloe's not so sure about the authenticity of the 20-carat engagement ring Kim wears. This Mexican vacation is keeping the party going for Khloe, who turns 27 on Monday.