Shoppers line up to shop on the opening day of fast fashion e-commerce giant Shein, which is hosting a brick-and-mortar pop up inside Forever 21 at Ontario Mills mall

Ontario, CA - October 19: Shoppers Ashley Sanchez, center, of Fontana, poses for her friend Joscelin Flores, not pictured, who was taking photos with their bags of merchandise after being among the first group of shoppers taking the opportunity to shop on the opening day of fast fashion e-commerce giant Shein, which is hosting a brick-and-mortar pop up inside Forever 21 at the Ontario Mills Mall in Ontario Thursday, Oct. 19, 2023. (Allen J. Schaben / Los Angeles Times via Getty Images)