Rihanna is really embracing the whole diamond thing. First, she wore this glittery crop top in London last month. Now the Daily Mail reports that she's dyed her hair an icy, diamond-y gray! The singer and River Island collaborator showed off her new, silvery locks on Instagram, stating "Grey is the new black! Blondes it's quiet for y'all." Gray isn't new: Kelly Osbourne, Kate Moss, and Tavi Gevinson have done the trend already, but we're fans of Rihanna's risqué interpretation of granny chic, including her take on how to wear cardigans: further proof that she can pretty much make anything look sexy.