Is it possible to live 2 lifes like Hannah Montana?

It's not something I am planning on doing but I was just wondering is that even possible? What about your credit cards and Id and all that stuff wouldn't some real identification? Isn't that identy theft? Haha. What if you got like colered contacts a wig idk just a really great disguise... Do you think that it is possible for somebody to pull it off? Hahah thanksss ;)