Everyone is super-enthusiastic about Kanye's Fallon performance last night, and with good reason — those kids! the Ray J. dis! And then Charlie Wilson, absolutely upstaging everyone. You should watch it. But you should also watch Janelle Monáe's Letterman performance, which involved some furious desk dancing and at least one assault on a mike stand. (It's fine.) Janelle Monáe does not do things halfway. Respect.