Hilary Duff regrets underfeeding herself as a teenager by keeping to a strict diet of only steamed vegetables and grilled chicken.

Duff, like many of her too-thin-teen peers at the time, says she was paying too much attention to what other people thought of her appearance.

The singer/actress revealed to ‘Health’ magazine: “I got pretty skinny when I was between 17 and 19. At the time I was starting to become aware of what people said about me and how I looked in pictures. I regret it because I don’t think I was happy then.”

Speaking now, at 23, she says the years were a difficult time of her life after breaking up with boyfriend, Good Charlotte singer Joel Madden. The ‘Play with Fire’ singer says that her new husband, ice-hockey player Mike Comrie, helped her through the tough times.

Watch Hilary's video for 'So Yesterday' below: