Well if you don't have a Valentine, at least you can have the new Sports Illustrated swimsuit issue featuring Kate Upton. Come behind the scenes with Kate Upton as she sees herself on the cover of the SI Swimsuit issue for the first time and talks about what the prestigious honor means.

Last night on the The Late Show with David Letterman, Dave revealed who was going to grace the cover of the new S.I. Swimsuit issue.

Check out Kate's reaction to learning she was going to be the cover model.