Dear Britney and Christina, True fact: I have now spent 173 hours learning the choreography to the “(You Drive Me) Crazy” video (speaking of which, Brit, are you really friends with Sabrina the Teenage Witch?). And every night after practicing the part with the chair — which really hurts my ass, by the way — I fall asleep listening to “Reflection.” Mulan is the best! Anyway, the reason I’m telling you this is because a lot of my friends say I have to pick between the two of you, and I don’t think that’s true. You are both such talented role models for girls my age. The way you sing about love has really helped me through my first relationship with an older guy (he’s 14!!!). Can you do a song together? I think “Hit My Genie in a Bottle One More Time” would be a huge hit. Maybe record something with a third female singer? Just, ew, not Mandy Moore. With lots of love, Fangirl ‘99