Ahh, the customary right of passage for every girl-of-the-moment: Talk trash on "It" girls past. TeenPeople.com put Lily to the test.TeenPeople.com: You've been labeled an 'It' girl so we were wondering what you thought of some of the others that share that title. What do you think of Jessica Simpson? Lily Allen: I'm definitely not into her music. TeenPeople.com: Paris ...