Luna: "But what if they still fear me, and no longer want my night?"
Celestia: "They are your subjects, Luna, they will always love you. You just have to show them that you love them, as well...now, enjoy your Nightmare Night. It is your night, after all!"
Just a little comforting scene of Luna and Celestia before the Nightmare Night episode. She may have acted all big and bad, but Luna just wanted to be loved.