Hilary Duff is looking quite fit after giving birth to her son Lucca. She managed to shed 30 pounds—in eight months! She must have immediately hopped on the treadmill after she gave birth to her son, right? Well, not exactly. The former pop princess recently talked about her routine to losing the pounds—which isn't exactly a big secret. Her weight loss routine required A LOT of working out with personal trainers. That said, you too can lose weight immediately if you hire a celebrity personal trainer. It's as simple as that!