Happy Birthday, Heidi Montag!

Heidi Montag celebrates her birthday with a picnic at the Will Rogers State Park on Monday with the help of boyfriend Spencer Pratt.

The Hills star turns 22 years old today.

This photo shoot is one of their funniest ones yet! Speidi got a bit messy when they gobbled down her birthday cake without any utensils. Heidi got a new pair of Yves Saint Laurent ankle booties, a dozen roses and a new purse.

HAPPY BIRTHDAY, HEIDI!

10+ pictures inside of Heidi Montag‘s 22nd birthday picnic…