After reading all about the fabric boutiques one could conclude that this was one such dress, but given that it was extremely well made, I highly doubt it was a make it yourself dress and that it was indeed a YSL couture piece or it was made for a customer by a high end dressmaker following the YSL pattern, using the YSL fabric
Finishing her routine with a power stance, she showed the judges just how spectacular the outfit and her routine was
Women's Oversized Comfort Colors Back Print T-shirt Key Features: Fabric: 6.1 oz./yd (US), 10 oz/L yd (CA), 100% ringspun cotton, 30 singles
I did this for two reasons
Elsa Schiaparelli: Surrealism, Art and Revolutionary Fashion. DailyArt Magazine
This is why 90 fashion keeps coming back: theres a version of it for basically every personality type (even the I dont care personality, which ironically cares a lot)