What is a Boy Band?

First, I've got to come up at least a working description of what a boy band is so that I can determine what groups I want to feature in my (hopefully) book.

1) An all male group
2) 3 or more members
3) Must have die hard fans
4) The groups image will be found plastered to the walls of their fans bedrooms, notebooks, t-shirts, lunch boxes, etc.
5) The groups image is marketed to teen-agers, young adults, pre-teens, tweens, etc.
6) All the members sing
7) The members can both sing songs they wrote themselves or by someone else
8) May or may not dance.
9) Each member must have a unique identity, so that a fan can pick out his/her favorite.
10) Must have a live performance history

Anything else?