The model wowed at a party hosted by 'British Vogue' and Chopard.
Shayk wowed in a black bra and panty set, which she paired with gloves, a sheer slip, thigh-high stockings and heels. She also sported a dramatic diamond necklace.
Before heading inside, Shayk added black sunglasses to her look but switched out her shades for a black blazer when she stepped inside.
Shayk has been making major fashion statements throughout her time in Cannes. When she attended the Killers of the Final Moon premiere on Saturday, she wore a blue Armani gown with a deep v-neckline.
She followed up that outfit by completely baring her midriff at the Sunday premiere of Firebrand. Shayk wore a Mowalola look with a top that crisscrossed over her breasts, left her stomach bare, and finished with a floor-length skirt.
Cooper and Shayk split in 2019 after four years of dating. The pair have appeared to remain on friendly terms since the breakup, even vacationing together last summer. They were most recently spotted together walking arm in arm in New York City last November.
"Bradley and Irina are great co-parents to their daughter and love spending time together as a family and also just on their own," a source told ET last year. "They have a good thing going and still have a lot of love for each other. They have so much fun together whether they're just hanging out, vacationing, or going out. The connection and flirty vibe between them is strong and still very much there."