"Two people called me on the same day about working with Chris Brown on that song, and I thought that seemed strange," Paul said. "Chris has had some fantastic hits. I didn't think [the offer] was real at first, but I thought, if it's real, that's brilliant.
"I knew that song was written from our perspective, from an island perspective, talking about this girl, and I guess Chris wanted to work with me."
Full article here.