Kate Upton attends the 2011 Sports Illustrated swimsuit issue unveiling party, in New York. She's a Florida girl who's comfortable in a bikini, and now 19-year-old model Kate Upton is on the cover of the 2012 Sports Illustrated Swimsuit issue. (AP Photo/P

Kate Upton, 2012.

Kate Upton poses with a billboard image of the 2012 Sports Illustrated Swimsuit issue, Monday, Feb. 13, 2012 in New York as part of her appearance on Late Show with David Letterman. Upton is on the cover of the 2012 Sports Illustrated Swimsuit issue. (AP

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 February 17, 2011 in Las Vegas, Nevada. (Photo by Michael Loccisano/Getty Images for Sports Il

Sports Illustrated Swimsuit 2011 Rookie of the Year, Kate Upton tries her hand (both of them) at milking a "cow" filled with SoBe Orange Cream at the brand's "Try Everything" event in New York on Wednesday, May 25, 2011. (Albert Ferreira/SoBe Try Everyth

Sports Illustrated swimsuit athlete Bruna Schmitz and Sports Illustrated swimsuit models Kate Upton and Genevieve Morton attend Club SI Swimsuit hosted by Vanity at Vanity Nightclub at The Hard Rock Hotel and Casino on February 17, 2011 in Las Vegas, Nev

Kate Upton SI Swimsuit 2012 Cover Model Kate Upton visits NBC's Today Show at Rockefeller Center on February 14, 2012 in New York City. (Photo by Donna Ward/Getty Images for Sports Illustrated)

Model Kate Upton participates in DIRECTV's Sixth Annual Celebrity Beach Bowl Game at Victory Field on February 4, 2012 in Indianapolis, Indiana. (Photo by Chris Trotman/Getty Images for DirecTV)

Victor Cruz, Kate Upton

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 February 17, 2011 in Las Vegas, Nevada. (Photo by Michael Loccisano/Getty Images for Sports Il

Kate Upton SI Swimsuit 2012 Cover Model Kate Upton visits NBC's Today Show at Rockefeller Center on February 14, 2012 in New York City. (Photo by Donna Ward/Getty Images for Sports Illustrated)

Kate Upton

Model Kate Upton attends SiriusXM Broadcasts Live From Radio Row during Super Bowl XLVI Week in Indianapolis at the JW Marriott on February 3, 2012 in Indianapolis, Indiana. (Photo by Cindy Ord/Getty Images for SiriusXM)

Kate Upton is shown in a photo from the "Sports Illustrated 2012 Swimsuit Issue." (AP Photo/Walter Iooss Jr. for Sports Illustrated)