The Smile singer shared photos of herself, dressed for a big night out in the French city.
In the first photo, Lily shows off the top of her sparkling Chanel dress, complete with matching spangly earrings.
Her face, as always, looks flawless and she appears super-stylish with heavy eyeliner. The photo is captioned with: "Chanel vybez."
In the second pic, she gives fans a glimpse of the gem-encrusted border on her designer frock.
Alongside this photo, she wrote: "#chanel #cannes #fancy."
Lily, 29, is a big fan of Chanel, and even had a £200,000 wedding dress made by the luxury fashion house when she wed husband Sam Cooper in 2011.
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