As a supermodel, it’s easy to claim Molly Sims’ gorgeous looks are simply due to good genetics, but it turns out, the busy mother of three actually puts in a lot of hard work in order to stay looking her best. “When you’re tired, busy and have kids, you have to be diligent,” says Sims, referring to the intensive workout and diet routine she sticks to. You May Also Like: Molly Sims Gets Candid About Hollywood’s Top Procedures When it comes to food, Sims turns to a nutritionist for an extra boost. “I work with a really good woman named Kelly LeVeque who also…