Carol Alt, 59, poses topless for Sports Illustrated's 'Swimsuit Icon Challenge'(00)

Carol Alt, 59, poses topless for Sports Illustrated's 'Swimsuit Icon Challenge'(00)

Image gallery: Sports Illustrated Models Naked

Carol Alt, 59, poses topless for Sports Illustrated's 'Swimsuit Icon Challenge' Ronda Rousey Goes Topless For Sports Illustrated 2015 Models paint on their bodies for a cause in Sports Illustrated Swimsuit issue's first nude