"Award-winning record producer Polow Da Don, who has earlier teamed with music icons like Will Smith, Usher, Ciara, Fergie and the Pussycat Dolls, reportedly convinced the couple to work on the love track, stressing on the timing which would be a catalyst to produce powerful music."
Here's the link where i found it:
http://www.themoneytimes.com/articles/2009...id-1053217.html