Naturally I'm always trying to stay current on the latest haircare in the biz, but lately it's been a much prettier and more pleasurable perusal because of celebrity endorsements. And while we can safely assume this isn't all Katy Perry's own coif, it's still a pretty effective ad for a blow-dryer. 

Katy's no stranger to the campaign (check out more photos in the gallery), having endorsed GHD's styling tools since early last year, but we're loving the latest installment in her series of glamorous characters shot by David LaChapelle. [via HuffPost]

What's your favorite Katy Perry for GHD ad?