Reporter Iman Amrani investigates TikTok sensation SHEIN. The Chinese fast-fashion retailer overtook Amazon this year to become the most downloaded shopping app in the US. With the company’s worth reportedly adding up to $43 billion, it’s an unrivalled fashion eCommerce success story. Iman will explore how Shein has mastered social media marketing to become a global fast fashion phenomenon. During the pandemic, everyone from influencers to high-street loyalists grew to love it. But Shein’s infamously opaque business is starting to hit headlines. Rumours of exploitative working conditions in its factories and the devastating environmental impact of fast fashion are trending more than ever. But very little has ever been brought to light - until now as undercover cameras go inside Shein’s factories in China for the first time.