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Club SI Swimsuit: Kate Upton and Irina Shayk

Irina ShaykSports Illustrated
Sports Illustrated swimsuit models Kate Upton and Irina Shayk attend Club SI Swimsuit hosted by Vanity at Vanity Nightclub at The Hard Rock Hotel and Casino on Feb. 17, 2011, in Las Vegas. Michael Loccisano/Getty Images for Sports Illustrated