The 43-year-old star donned the sparkling outfit to do her exercises in before she took to the stage during the UK leg of her 'Dance Again' tour last year, reported Contactmusic.
"She did work out in her studded Swarovski suit just before she went on stage every night. She's flawless. She just looks like she does on telly," a source said.
Besides her extravagant workout costumes, Lopez takes a team of interior designers on tour with her to kit out her dressing room.