AceShowbiz -

Kate Upton flaunts her smoking hot bikini body on the cover of Sports Illustrated's 2013 Swimsuit Edition. Gracing the magazine's cover for second straight year, the blond beauty braves the super cold Antarctica weather only with a white bikini bottom while teasing her braless breasts under an unbuttoned winter jacket with a fur-lined hood.

The daring image, according to TMZ, was leaked online on Friday, February 8 before SI eventually posted the official version on their own Facebook page. Upton reportedly did the "Polar Bare"-themed photo shoot in the middle of the frozen antarctic tundra around December when the temperature dipped down to 35 below.

Despite the chilly weather, the "Tower Heist" star didn't hesitate to bare her skin in a super skimpy bikini and pose seductively in front of the cameras. As shown in the cover, the background features an icy Antarctica landscape including massive icebergs.

Upton follows the footsteps of nine other models who have graced the SI cover twice. Kathy Ireland and three other models appeared on the cover three times. Her 1989 cover marked the best selling SI edition of all time. Meanwhile, Elle Macpherson broke the record by flaunting her body five times on the magazine's cover.

As for Upton, the Michigan-born starlet beat out such sexy ladies as Nina Agdal and Katherine Webb to appear on the cover of SI. Last year, she grabbed the headlines after showing her busty figure in a teeny bikini on the beach for the magazine.

Upton's latest SI issue will hit the shelves on February 12.