DIY Cage Harness Bra Tutorial from This Fashion is Mine. This is a detailed tutorial on how to add elastic, etc… to a bra. This cage bra was inspired by Lea Michele when she wore one similar on Glee while singing “All that Jazz”. Top Photos: Lea Michele on Glee, $115 Marlies Dekkers Leading Strings Underwire Push Up Bra here. All Other Photos: DIY by This Fashion is Mine.