This article presents a case study about three underwear and footwear advertising campaigns aimed at girls and adolescents in the context of the promotion of the back-to-school season in Chile in February 2020. The adverts caused social and media controversy. Social media users accused the brands of sexualizing children and adolescents' images for marketing and commercial ends. Based on an interpretative analysis of the graphic pieces involved in the campaigns, this article reflects on the representation of girls and adolescent girls. This research observes a resort to female gender stereotypes characteristic of the fashion industry extended to childhood. Considering that advertising is one of the main discursive axes central in the social and media construction of infancy, we discuss the risk of normalizing communication strategies which appeal to the increasingly earlier seduction and erotization of infant and adolescent bodies through mass media despite prevailing ethical and self-regulation codes in the country.