The star posed for pics in a stunning black tulle Roberto Cavalli dress with a shell-shaped bust detailing ahead of her performance at a dinner hosted by jewellery house de Grisogono.
The singer, who's currently touring with the Black Eyed Peas, sported beautiful earrings and a boule diamond bracelet by de Grisogono, worth a pretty penny!
The star-studded party was held at the exclusive Hotel du Cap, and Cheryl entertained guests including Naomi Campbell and Margerita Missoni.
As she got up on stage in her signature split trousers outfit, she said: 'Hello Cannes, thanks for making me feel so welcome', before performing her hits Fight For This Love, 3 Words, Parachutes and a new track Stand Up.
After a rapturous reception, Cheryl joined Will.i.am at the DJ booth for his two-hour set.
Cheryl is flying to Antwerp for a gig tonight, before performing in Paris on Thursday, and is said to be back in Cannes on Friday.
Wonder what she'll pull out of the closet for her next Cannes red carpet moment!
By Ruth Doherty