Why do hair shampo or any hair product commercials always get a brunette model and not a blonde ?

i have nothing against brunettes .. im a brunette myselfWhy do hair shampo or any hair product commercials always get a brunette model and not a blonde ?
cause they want natural healthy hair not fried hair. Blondes are from bottles.Why do hair shampo or any hair product commercials always get a brunette model and not a blonde ?
Dark hair is traditionally more ';healthy looking'; as most natural blonde colors are not very pretty, and bottle blonde hair needs a lot of help to look healthy.
because the light plays better on a dark coloured hair and it is easier to observe its healthyness than on a light coloured hair ;)
There are blonde commercials... but in general, the darker the hair, the more the highlights of the lighting shows, the more shiny/silky the hair looks on camera. There's not as much contrast with blonde hair. Some of the hair is altered with computers. I believe the Pantene commercials use computer-generated hair to add to the reflective properties.
because in the u.s all we have is bleached blondes
i dont really know
when they show brunette's hair it shines better in the light than it does with a blonde.