I have a Maine Coon Cat at home. How do i stop the shedding?

Maggie (my Maine Coon) is 13 lbs. She is wonderful, but her fur is everywhere. My fiancee isn't so fond of the shedding. I've had her stomach shaved and it helped a little. He wants me to get "lion cut" for her - where she is all-shaved except her head and feet. Is there any other way to stop the shedding?? i've tried food additives, special food, and i brush her 2-3 times a week.