While you were in that meeting, daydreaming about what you're going to have for lunch, it has been noticed that Mario Testino has joined Instagram. The Peruvian fashion photographer is behind some of the most iconic images of recent times: he's lensed multiple royals (fashion and regular), including Princess Di and K-Mid, K-Moss and Gisele. In fact, he's credited for introducing Gisele to the world (thanks Mario!) and giving Brazil its fashion moment in the late 00s. So, if ever there was an Instagram must-follow, it's @MarioTestino.