Last 16th of January of 2017, Trendencias magazine published the ranking with the thirteen most influential fashion bloggers of the year in Spain, thus establishing a direct relationship between the fashion industry and social networks. This article makes a descriptive analysis with exploratory characteristics through the content analysis of the strategy - first multichannel and second developed on Instagram-carried out by these thirteen Spanish influencers of fashion and reference with great presence on the Internet that have become authentic leaders of opinion. The objectives go through identifying the main channels, online communication strategies, popularity and interactions made by the public as well as identify the presence of brands in Instagram posts, know their characteristics, formats, compositional elements, reach and engagement of this new commercial communication that moves away from official corporate channels. The results provide a taxonomy on how advertising communication is configured in the social networks of the influencers and show that there is no direct correlation between the activity and the popularity of them, as well as the null advertising identification of the posts.