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Hayek, 41, who suffered from gestational diabetes, told Oprah Winfrey, "I'm taking my time" losing the weight.

SALMA HAYEK 10 months after

May '07

Spotted at a spinning class a day before giving birth to Sunday Rose, the actress, 41, was back on the bike in three weeks.

NICOLE KIDMAN 3 weeks after

May '08

"She feels better when she exercises," says trainer Ramona Braganza of Berry, 41, whom she sees five times a week.

HALLE BERRY 4 months after

March '08

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

June '08

Braganza began working with Alba, 27, within a month of baby Honor Marie's arrival.

JESSICA ALBA 7 weeks after

May '08

JENNIFER LOPEZ 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.

Feb. '08