It's funny, i so rarely browse reddit, but i somehow happened upon this story this week - i guess it came up in some kind of mega "what are you most ashamed of" thread or somesuch. Ultimately it was as GP described; a redditor researched one of 'gone wild' big 'stars', poured through her history ,ultimately found another reddit account of a selfie shot that had the same background as the 'gone wild' shot so concluded they were the same or friends, researched back that history and ultimately found her real identity.