By Catherine Kast Here's an early look at the steamy Kate Upton Sports Illustrated swimsuit cover, which goes on sale Tuesday. Upton, a 19-year-old Florida-bred model who follows in the footsteps of bikini-baring bombshells like Brooklyn Decker, By TARA PALMERI All-American beauty Kate Upton is sizzling on the cover of Sports Illustrated's 2012 Swimsuit Edition. [...]