When it comes to fancy evening hair, we know a few things to be true: A.) Sweeping your strands off your face equals instant glamour, and B.) Nothing's sexier than showing a little neck. Good thing the classic topknot is back in a major way! This always-elegant style manages to do both, while also being incredibly easy to do. From Jada Pinkett Smith to India Arie, here are the celebs with the best buns in Hollywood.