1. When she's singing, say "Oh, are you practicing your dog call?" (yes I know I did a similar one for Cosette, but they are both high ranges!)
2. Call her CHRISTMAStine (Hey, I know this is lame, but would you be annoyed if someone repeatedly called you that?)
3. Then say, "Ooh do I get presents Christmastine?"
4. Tell her that Raoul is more interested in Carlotta than her
5. Say, "Oh hi Phantom! Are you here to kidnap Christine again?" when ever she's around
6. Dress up like the Phantom and chase her around
7. Ask her how her two boyfriends are doing
8. When she looks confused say, "Oh come on Christine! We all know you are cheating on Raoul with the Phantom!"
9. Ask her why she kissed a murderer
10. Avoid getting slapped, punched, or kicked by Christine or one of her two boyfriends that are very protective of her