One of the most visually striking scenes of the film sees the two protagonists – Zola (Taylour Paige) and Stefani (Riley Keough) – getting ready to dance. The uncomfortable and pervasive way with which Stefani enters Zola’s life is all here – the images of the girls reflected on mirrors overlap, a symbol of how one (Stefani) presents herself as a double of the other (Zola). This will become clearer as the film unfolds: Stefani systematically appropriates black culture (the language, the aesthetics, even the grooming tools) for her own (professional) advantage.
Even the mascara they use is the same – Maybelline Great Lash in its waterproof version.
Mellie Logan (Riley Keough) uses almost exclusively Tigi Bed Head products at the hair salon where she works. Starting from the farthest table to the nearest, I’ve spotted the following:
A round bottle of Small Talk energizing cream
A bottle of Elasticate 
A bottle of Straighten Out 
A bottle of Control Freak 
A bottle of Maxxed-Out 
The odd one out here is a pink can of Aqua Net super-hold hairspray
Even the pink hairdryer is by Tigi: it’s the Mind Blower 
World Wide Aura 