An It Girl, is a girl that 'everyone' wants to be, but being an It Girl, means, sucking every guys cock, being the shires slut, and being put on the spit, at least once a week. so in the end, no one wants to be the It Girl, no one wants to know the It Girl, the It Girl is the little girl in the corner, full of all kinds of sexually transmitted infections (STI's).
All the little girls that dress like a slut, act like a slut, and be like a slut. there the ones that end up like that. It Girl.