Kate Upton: Swimsuits Are 'Everyday Wear' For Me

While most women dread bikini season, two-time Sports Illustrated Swimsuit Issue cover girl Kate Upton tells ET she's so comfortable in a swimsuit, she'll wear them year-round.

"I've always been comfortable [in a bikini]," admits the 20-year-old buxom blonde who grew up in with the perpetual hot temps and sunny skies of Florida, her home state.

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"It was everyday wear," Upton says. "I dont really see what's wrong with being in a swim suit."

Despite her comfort in a bikini, the 2013 SI cover girl wasn't exactly in her element when faced with the sexy shoot in frigid Antarctica.

"There was no way for me to prepare for Antarctica weather," laughs Upton. "It was summer and 20 degrees with a high of 20. The sun was out most of the days and it was beautiful, but I'm from Florida."

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Regardless, the shoot turned out to be a hit. Check out the winning shot that earned Upton the coveted cover here.

SI's Swimsuit Issue hits stands today!