Fact: Anh Co Tran’s signature lived-in wave is so popular, the celebrity hairstylist had it trademarked. The effect is one you’ve probably re-pinned onto your Pinterest hair inspiration board, or double-tapped on Instagram and its undone, touchable appearance is coveted by cool girls everywhere—including Emily Ratajkowski, who coincidentally played Ben Affleck’s “cool girl” love interest on Gone Girl. (READ MORE VIA INSTYLE)