Geri Halliwell lost weight after pregnancy, how?

I talked earlier about breastfeeding in a slightly different context but there may be another good reason to do it: weight loss after pregnancy.

Geri Halliwell, the former Spice Girl, who gave birth to Bluebell, tells OK! that breastfeeding helped her get back in shape (from 133 lbs during pregnancy to 105 after losing all the extra pounds).