I don't agree with Britney being a strong woman at all. The poor thing's a mess.
I'd say Tina Turner too and Julianne Moore, also Hilary Swank. Diane Lane.
I would've said Whitney too at one point but it sadly turned out she was anything but strong. She was very talented though.
She's coped with a considerable amount considering she was a child star and is probably ill. She hasn't looked like she's wanted to be there the past few years and yet she's still trucking on.
I say her inclusion is warranted.