Prince William's fiancée Kate Middleton has won the hearts of millions around the world with her wholesome nature, natural beauty and charm, but according to author Carol Lieberman she won the heart of the future King of England by quite different means -- channeling her inner bad girl!

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In an exclusive interview with RadarOnline.com, Leiberman, author of Bad Girls: Why Men Love Them & How Good Girls Can Learn Their Secrets reveals how the princess-to-be used some age old, tried and tested "bad girl techniques" to snag her handsome beau - including wearing a see-though dress, undergoing a complete physical makeover, working out to get a bangin' body and flirting with guys to make poor Wills crazy with jealousy.

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