I really hope this didn't come as a shock to anyone.
Idealized Women in TV Ads Make Girls Feel Bad
By Alan Mozes
"TV commercials that depict idealized images of rail-thin feminine beauty can send young female viewers–particularly those who place great importance on their appearance–into an immediate tailspin of increased anger and body dissatisfaction, Australian researchers say."
"'Viewing television commercials containing images of the unrealistic thin-ideal for women caused adolescent girls to feel less confident, more angry and more dissatisfied with their weight and appearance,' said study lead author Duane Hargreaves of Flinders University in South Australia."