Hayek, 41, who suffered from gestational diabetes, told Oprah
Winfrey, "I'm taking my time" losing the weight.
10 months after
Spotted at a spinning class a day before giving birth to Sunday Rose, the actress, 41, was back on the bike in three weeks.
3 weeks after
"She feels better when she exercises," says trainer Ramona Braganza of Berry, 41, whom she sees five times a week.
4 months after
Alves, 25, hasn't resumed exercising since giving birth to Levi, her son with Matthew McConaughey
, but a diet packed with salads and fruit has helped get her trim.
CAMILA ALVES 3 weeks after
Braganza began working with Alba, 27, within a month of baby Honor Marie's arrival.
7 weeks after
5 months after
After putting on 50 lbs. with her twins, Lopez, 39, took it easy for four months. Now she works out up to six times a week, says Gunnar Peterson, who is training her for a triathlon.