The 31-year-old actor, who reportedly decided to take a "break" from long distance girlfriend Amanda Seyfried, said that they had a "fantastic" time dancing at a Grace Jones concert.
"Yeah, [Lindsay] was there. She was dancing - we were all dancing - it was Grace Jones," Cooper told Bang Showbiz. "Grace was three hours late. Fantastic. But she should be, she was wonderful."
He also said of the French festival location: "I was in awe of Cannes. I was on a yacht with submarines attached!"
Cooper and Seyfried are allegedly "trying to work things out".
