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.

More On This...

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

Enjoy.