The Met Gala is the one occasion when you can truly try anything — like painting your hair silver or wearing a headpiece that weighs more than a small child. But sometimes, it's the smallest tweak that can make the biggest difference. Such is the case when Rihanna, patron saint of the Met, stepped onto the carpet. If you're anything like us, you could immediately tell she did something different, but it took a minute to realize just what that was. The it hit us: her brows!