Kate Upton, Bar Refaeli, Marisa Miller, etc.: Your fave Sports Illustrated cover model? [POLL]

On Monday (Feb. 13), Sports Illustrated revealed Kate Upton as the cover model for their annual swimsuit edition. While the 19-year-old looks stunning in her Valentine's Day red bikini, how does she rank among all-time SI cover models?

In what is probably the most difficult thing we've had to do all day, Zap2it has compiled our favorite SI swimsuit covers so that you, the voting public, can pick your favorite. We've included such bikini babes as Tyra Banks, Elle Macpherson, Beyonce and Marisa Miller.

So review your choices and vote below. And feel free to thank us later.

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Photo/Video credit: Sports Illustrated