There's no doubt about it. Your sister is a 'fun person'. She knows the best people, the best places, and can always show you a good time. Every single one of those times is amazing not because of her knowledge, but because you're having them together. So reach through space and give your sister a birthday drink. Wish her health, wish her love, and wish for a swift, fast reunion. Wish her a fun, crazy birthday, and then wait by the phone for the details the next morning.