The growth of Instagram continues, with the majority of its users being young women. This study investigates the impact of Instagram upon source credibility, consumer buying intention and social identification with different types of celebrities. In-depth interviews were conducted with 18 female Instagram users aged 18–30 to determine the extent to which Instagram influences their buying behaviour. The research findings show that celebrities on Instagram are influential in the purchase behaviour of young female users. However, non-traditional celebrities such as bloggers, YouTube personalities and ‘Instafamous’ profiles are more powerful, as participants regard them as more credible and are able to relate to these, rather than more traditional, celebrities. Female users are perceptively aware and prefer to follow Instagram profiles that intentionally portray positive images and provide encouraging reviews.