As/Is·Posted on Feb 15, 2017Kate Upton Is Topless On Sports Illustrated's Body-Diversity Swimsuit Issue CoverIt's the most boobiest time of the year...by Julie GersteinBuzzFeed StaffFacebookPinterestTwitterMailLink Rejoice! The Sports Illustrated swimsuit issue is here. And Kate Upton is back on its illustrious cover. Sports illustrated / Yu Tsai This time, she's got not one but three covers. Sports Illustrated / Yu Tsai The theme of this issue? Celebrating "body diversity and age inclusion." Sports Illustrated / Yu Tsai Naturally. The mag also features shots of tennis pro Serena Williams... View this photo on Instagram Instagram: @serenawilliams ...model Ashley Graham... View this photo on Instagram Instagram: @theashleygraham ...and supermodel Christie Brinkley with her daughters Alexa and Sailor. View this photo on Instagram Instagram: @christiebrinkley Another new addition? Model Hunter McGrady, who wrote on Instagram, "I have never felt sexier than I did in this shoot." View this photo on Instagram Instagram: @huntermcgrady "Beauty is not a number. It has no limits." The full issue is on newsstands now.