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Sexy celebrity ad campaigns: Despite starting in an ad for Lancome lipsticks, Emma Watson made sure her stems were the focus in pink satin knickers. She stopped the shots from being too sexy by covering up with a white shirt – we like her style! Photo:Lancome

Sexy celebrity ad campaigns

From Rihanna in Armani lingerie to Katie Holmes clad only in H.Stern jewellery, omg! take a look at the hottest brand ambassadors and the pics

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