Top40artists especially, from Little Richardandproto-feminist LeslieGore, to David Bowie, Madonna and Lady Gagahave pushed social progress by bending and breakinggenderrules.
The upper echelon of the pop-music touring business is, like Silicon Valley, dominated by a small number of enterprises: Lady Gaga, Madonna, U2, Jon Bon Jovi, Jay-Z, and a very few others.