Twilight has finally achieved princess-hood, and it's Celestia's job to greet her and guide her. Celestia is proud of her student for overcoming many obstacles, bravely facing them head on, and confidently grabbing them by the horns with the power of friendship. After all, Twilight is the new princess of... uhh... what was that again?

Maybe Celestia should have visited more often instead of relying on letters.