'Sports Illustrated' swimsuit covergirl: Kate Upton

Ya know... just in case you were interested in who was in the 'Sports Illustrated' swimsuit issue".

She wears a tiny red-and-brown, sparkle-covered string bikini with a view of the waters of Australia behind her as she poses for the magazine cover, which is scheduled to be unveiled on TV Monday night on Late Show with David Letterman on CBS.

"That was one of the first photos from the first shoot," she said in a telephone interview before the big reveal. "It was my favorite swimsuit. … I felt sexy in it but confident."

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