Rihanna and Chris Brown could be collaborating yet again.
According to sources, the pair with a checkered past — who most recently worked together on RiRi’s remix of “Birthday Cake” — were overheard discussing Rihanna’s making an impromptu cameo in a video Brown’s been shooting along the French Riviera with hip-hop brethren Swizz Beatz and Ludacris.
Rihanna and Brown were seen together in a marathon conversation Sunday night in St. Tropez as guests on the Serene, a $300 million yacht owned by Russian vodka billionaire Yuri Shefler. Also aboard were Leonardo DiCaprio, Kanye West and Kim Kardashian, as well as members of the Saudi royal family and the night’s host, Crown Prince of Dubai Sheikh Hamdan.
“Rihanna had her own yacht moored nearby,” said a spy, “and Chris had been visiting her. But they came over to The Serene Sunday to join Leo with Swizz Beatz and Ludacris.”
Our source added, “There were clearly sparks flying between Rihanna and Chris. They spent a lot of the night in deep conversation. It’s clear things are very good between them again. They seemed happy to be together.”
Another source added that the two were heard discussing a possible appearance by RiRi in Brown’s video, although others say that she hasn’t shot footage yet. Meanwhile, Brown’s playing a gig at Cannes club Gotha tonight.
On the Serene, we’re told DiCaprio celebrated without girlfriend Erin Heatherton before his “The Wolf of Wall Street” films next month. West entertained guests at sea by performing two or three songs.
Also in St. Tropez, Unik Ernest’s Edeyo Foundation drew 400 for a glittering Haiti fund-raiser at a chateau rechristened The Pepsi Castle.
DJ Steve Angello rocked the Monday night bash where Tara Reid was spotted dancing on a banquette after being treated for food poisoning and a weekend jet-ski mishap. The party raged till cops arrived at 4 a.m., but the crowds simply relocated to Les Caves du Roy.