Model Kate Upton arrives at the Vanity Fair Oscar party on Sunday, Feb. 26, 2012, in West Hollywood, Calif. (AP Photo/Evan Agostini)

Tim Tebow with SI Swimsuit models Kate Upton and Chrissy Tiegen.

Sports Illustrated Swimsuit Issue cover model Kate Upton arrives at SI Swimsuit On Location hosted by Haze Nightclub at the Aria Resort & Casino at CityCenter on February 15, 2012 in Las Vegas, Nevada.

Kate Upton is shown in a photo from the "Sports Illustrated 2012 Swimsuit Issue."

Sports Illustrated Swimsuit Issue cover model Kate Upton joins host David Letterman on the set of the “Late Show with David Letterman,” Tuesday, Feb. 14, 2011 in New York.

Actress and model Kate Upton takes the stage before the NASCAR Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 26, 2012. (AP Photo/John Raoux)

Sports Illustrated Swimsuit edition cover model Kate Upton poses at the magazine's launch party in New York, Tuesday, Feb. 14, 2012. (AP Photo/Diane Bondareff)

Sports Illustrated Swimsuit Issue cover model Kate Upton visits Caesars Palace to mark Swimsuit Launch Week in Las Vegas and the upcoming celebration of Muhammad Ali’s 70th Birthday at Caesars Palace on February 15, 2012 in Las Vegas, Nevada.

Model Kate Upton arrives at the 2012 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 26, 2012 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)

Guillermo Rodriguez and Sports Illustrated Swimsuit Issue cover model Kate Upton arrive at Club SI Swimsuit hosted by the Pure Nightclub at Caesars Palace at the Pure Nightclub at Caesars Palace on February 16, 2012 in Las Vegas, Nevada. (Photo by Michae

Sports Illustrated Swimsuit Issue cover model Kate Upton and SI swimsuit model Irina Shay attend SI Swimsuit On Location hosted by Haze Nightclub at the Aria Resort & Casino at CityCenter on February 15, 2012 in Las Vegas, Nevada. (Photo by Michael Locc

Kate Upton arrives to the Vanity Fair Oscar Party for the 84th Annual Academy Awards at the Sunset Tower on February 26, 2012 in West Hollywood, California.

2012 Sports Illustrated Swimsuit Issue cover model Kate Upton attends SI Swimsuit Launch Party Hosted by Crimson at Crimson on February 14, 2012 in New York City.

Kate Upton arrives to the Vanity Fair Oscar Party for the 84th Annual Academy Awards at the Sunset Tower on February 26, 2012 in West Hollywood, California. AFP PHOTO / ADRIAN SANCHEZ-GONZALEZ (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images) R:\Merlin\Getty_Photos\509219895.jpg

Ari Emanuel