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Kate Upton celebrated her 22nd birthday Monday night in Chicago at the River North tiki bar Three Dots and a Dash.

The Sports Illustrated Swimsuit model was spotted in a tight red dress and kicking back with six friends.

“She wasn’t in a bikini,” laughs a witness.

According to a source, a friend who couldn’t make the celebration sent Upton a bottle of Champagne for a midnight toast.

She was in the Windy City with her Detroit Tigers boyfriend Justin Verlander, whose game was postponed Tuesday.

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    To help celebrate the joyous day, we have included 22 of our favorite Kate Upton photos in the gallery above.

    Enjoy.