The Olympics may have struggled with Olympics fans venturing to Paris because it's so insanely expensive ... but for celebs where money is no object, they turned out in force.
Tom Cruise, Jessica Chastain and Ariana Grande were among the stars who hit up the women's gymnastics venue -- the artistic gymnastics qualifications.
Ariana was flanked by her bro, Frankie and her "Wicked" co-star Cynthia Erivo.