By Breaking Celebrity News Staff

Who needs a prince when you've got one of Da Bears?

Newly-engaged beauty Kristin Cavallari was seen sporting a 5.2 carat diamond ring given to her by her fiancée, Chicago Bears quarterback Jay Cutler, as she left a gym in Los Angeles on Wednesday.

The 24-year-old socialite worked out for about two hours before re-hydrating with a Skinny Water on the way out. The Hills star has been dating the big-armed passer since last autumn. 

Cutler popped the