Source: Kristy Sparow / Getty Fast fashion site Shein is in a bit of trouble. Consider thinking twice before you 'add to cart.' Three designers have filed an official lawsuit against the online mega-site Shein. In a motion filed this week, the independent designers said they were shocked that the Chinese brand had copied and sold their products. Designers named in the suit are Krista Perry, Larissa Martinez, and Jay Baron. Commonly used among influencers, Gen-Zers,' and many looking for a "quick 'fit," Shein has grown exponentially over the past few years. The brand has worked directly with influencers to market to consumers, expanded sizing with offerings like Shein FIT+, and worked with designers for capsule collections called Shein X. But despite its trendy popularity, Shein has struggled with criticism about overall fit, fabrics and quality, and ethical practices. This week's suit illuminates this uncertainty. The California lawsuit states