Have you ever layered up a few coats of Trust Fund Beauty nail polish? It comes in plenty of shades, from ‘Boy Tears’ to ‘Insta-famous’. It's one in a number of Insta-born beauty brands that are stocked at # – a New York-based beauty store that only stocks products sourced on Instagram.

Since its launch in 2012, swimwear brand Triangl has been enjoying a long stint in the sun; set to rake in $60 million in 2015, it's sold almost a million bikinis. But what is it about these neon, neoprene numbers that’s got girls going wild on beaches across the globe?

Selling clothes plastered with memes, gifs and poop emojis, Shop Jeen has Gen Z and Y set firmly in its sights. But how has 23-year-old founder Erin Yogasundram – dubbed the “Queen Bee Of the internet” – amassed a cult following without spending a single dollar on advertising?

With international fashion brands making competition on the Australian high street even more intense, a new generation of home-grown brands are building fiercely loyal style tribes both online and off. But can these emerging fashion cults fend off global competition?