Drew Barrymore Want a bikini-ready body by summer? "Get up right now and get started," says celebrity trainer Kathy Kaehler who got Drew Barrymore in amazing shape for her role in Charlie's Angels with just two months to train. "I had Drew running, sprinting and jump-roping. She did everything I put in front of her." Start small and chart your progress. Each week increase the distance or time and intensity and you should start seeing results after about four weeks.