Picture - Crystal Hefner at REHAB Pool Las Vegas Nevada United States, Saturday 10th May 2014

Crystal Hefner - Joanna Krupa, star of Bravo's 'Real Housewives of Miami,' and her sister Marta Krupa, host 'Rehab Bikini Invitational' at the Hard Rock Hotel & Casino - Arrivals - Las Vegas, Nevada, United States - Saturday 10th May 2014

More: Joanna Krupa and Marta Krupa host 'Rehab Bikini Invitational' - Arrivals