The Ghost Whisperer actress is showing off a new toned physique just months after she was ridiculed because of photoraphs of her on a beach in Hawaii sporting a fuller figure.

But she wishes she had made the most of her youth and flaunted her body more when she didn't have to watch her weight.

Hewitt, who turns 30-years-old this upcoming February 2009, tells the September issue of Health magazine, ""I wish I had been nude from the time I was 12 until I was 28. I looked great! I so wish I had listened to my mom and grandma when I was 18 and would complain about some little tiny bump or feeling bloated. I used to scoff and say, 'No, I feel fat today!' Now the joke's on me.""

She adds, ""I want to tell all young girls to walk around in bikinis all summer, because there will be that one day in your twenties when you'll eat a hamburger and actually see the hamburger on the side of your leg.""

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