Just one day before announcing she and on-again fiance Jay Cutler were expecting, the pregnant former Hills star stepped out to grab groceries in West Hollywood, Calif.., Saturday wearing super sexy skinny jeans, a beige blouse and matching heelsAlthough she hid her eyes Under a pair of aviator sunglasses, it is clear the beaming star was on cloud nine. "She is really happy. She is in the early stages, but she can not wait to be a mom," a source tells Us Weekly of mom-to-be Cavallari, 24
