During a Tuesday, April 8 appearance on The Tonight Show Starring Jimmy Fallon, the model, 29, revealed that her recent silver hair transformation wasn't as permanent as it looked. "It was a wig ...

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debuted a glossy silver-grey bob. Wit-woo! See pictures of the 29-year-old's striking new 'do, below. Hairstylist Dimitris Giannetos – whose clientele also includes the likes of Demi Moore ...