I suppose it's only a gut feel, I just don't relate to them in the slightest. I suppose Branson is possible, he just projects so much extraverted energy and is the quintessential entrepreneur and it just doesn't jive with the type for me. I suppose what I could say is I don't think the persona he projects is ISFP and I don't know him well enough to say if that's his true self.
As for the rest I wish I had a better argument but it's just a gut feel, Kidman, Holmes and Blunt just seem too away with the fairies and I just don't relate to what I know of Aguilera.
I know I've given you absolutely no reason to change their types on your list (bravo by the way) but that's how I feel about it.
If I get the chance I might check out some youtube interviews and get back to you.