Hilary Duff recently admitted she's a fan and follower of Gwyneth Paltrow's "starvation diet." Paltrow, 50, made headlines earlier this year when she revealed controversial wellness tips, which included intermittent fasting followed by bone broth meals. "I know Gwyneth is in trouble for saying this, but sometimes I try to just drink coffee in the morning and starve off my hunger," Duff said during an interview on Molly Sims' "Lipstick on the Rim" podcast. The "How I Met Your Father" actress isn't the only Hollywood star to go to extremes and maintain a strict routine.