not really. there is fakery done to photos, usually called retouching. but in this case it's just the exposure bumped up a bit.
if you take a pic then bump up the expose in lightroom. does that mean its fake?
it's called retouching. although ususally they do it to cover stuff up. not the other way around.
but that's done in virtually every published fashion photo. legs made slimmer, face, arms made smoother, waist made smaller, skin color changed.
but in this case the change may have even been done by the photog himself since he released the brightnened version on his own instagram, and cindy then commented on it herself.
even the photo you posted was veery likely retouched.