Forget her two-toned hair and lacy bra, Lady Gaga gives us something else to talk about with Cartier's Diabolo Lunette sunglasses. Tucked behind her vintage shades, the singer gave us her best poker face in Cannes where she performed on Le Grand Journal’s live stage. The round spectacles originate from the 1991 Cartier collection and feature a black-and-gold frame with photochromic lenses that retain light, making them wearable day or night.
