NEW YORK (Billboard) - On the strength of powerful storytelling and the clever use of sampling, "Whatcha Say," the debut single from singer/songwriter Jason Derulo, is burning up mainstream radio ...

American R&B singer Jason Derulo notched up his third British number one single on Sunday with "Talk Dirty", ending U.S. singer Katy Perry's two-week run in the No. 1 slot, sales figures showed.