Cher (the superstar, not the x factor one).

Everybody calls Madonna the 'queen of pop' but i wonder if the title should really belong to Cher.
After all, she has been around since the 1960's and, like Madonna, has re-invented herself more than enough times.
She, unlike Madonna (who i do love, by the way), is also a successful actress and has been nominated for an oscar (if my memory is correct).
I think Cher should be crowned ultimate queen of pop.