Is blonde hair common in peru, bolivia, Paraguay, eg. "Inner south america"?

I was surprised to find out the singer Christina aguilera is not only latina, but specifically Ecuadorian (i always saw her as just a standard Disney white pop girl). Doing a little research, I noticed that Ecuador, peru, Paraguay, etc. are actually a lot more ethnically mixed then Brazil or Argentina and are generally more indigenous because of a lack of European migration(?). So are there people that look like Christina that come from those regions?