Jennifer Love Hewitt: Why I Chopped Off My Hair

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What inspired newly single Jennifer Love Hewitt to chop off her hair?

"I needed to feel lighter!" she told Tuesday at an Esprit flagship store opening in NYC. "We just finished season five of [Ghost Whisperer], and I was just ready for a change."

Complementing her new 'do: A sleek physique.

The 5-foot-3 Hewitt, 31, who recently shed an estimated 15-plus pounds, told Us, "I try to work out three or four times a week and eat healthy and that's about it."

Despite the workout routine, she told Us she can't "get rid of" her curves, but "I'm trying!"

On Tuesday, she released her new romance book The Day I Shot Cupid, which makes her "super excited," she told Us. "It's a book about love, dating, relationships and men and women and where we are."

She said writing the book even helped her deal with her recent split from Kennedy, 39.

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"I learned a lot from the book," she said, adding that she and Kennedy are "good. We're fine and still friends."