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Will.I.Am says the collaboration between Rihanna and Cheryl Cole will happen when they find the right song. "Rihanna and Cheryl will be great when it happens. I first told Rihanna about Cheryl in 2009 when I said she's like the princess of England," dailystar.co.uk quoted the 37-year-old as saying.
"No disrespect to the real royals but Cheryl's the pop princess and I've been telling Rihanna, so hopefully it will happen soon," he added.