LONDON, Nov 5: American rapper Eminem and singer Rihanna have grabbed the top spot in Britain’s single charts, the Official Charts Company said on Sunday, denying One Direction what would have been the band’s fourth number one. The duo’s joint track, “The Monster”, was taken from Eminem’s new album “The Marshall Mathers LP 2”, which is due to be released on Monday. It shot straight to the top spot even though it only went on sale last Tuesday.(agencies)