I cannot be certain, from my point of view, i'd say 50/50 %
I assume it would be hard to guess unless there be several surveys. Lots of girls normally and automatically look over characters specially Disney characters as they nicely designed, the engine atmosphere and creations are sparkling and characters would consider attractive. It's not a surprise to see young girls get influenced by following Disney princess and their principles in the movie. The level of influence depends on individuals.