At Glossier’s Chicago Pop-Up (114 N. Aberdeen St., West Town, through October 28), larger-than-life artwork melts onto the floor, mirrored plinths surround interactive testing areas, and sound-engineered domes grant cosmetic junkies a transporting shopping experience. This is the second pop-up for the brand that built a loyal following on Instagram with its natural-looking, barely there beauty products. “We want Glossier Chicago to be a destination where you can come, hang out with your friends, decide what you like, and have a great time,” says Melanie Masarin, who heads Glossier’s retail operations. All of the brand’s oft-hoarded products will be for sale and available for sampling. Walk in with the back-to-school blahs, and walk out with ethereal rosy cheeks and Cara Delevingne brows.