Sure, Kellogg's and General Mills have big advertising budgets, but they're nowhere near as powerful as Darwin.

Barry Callebaut runs seven huge chocolate factories, including two in Switzerland, from which it supplies industrial chocolate to the likes of Hershey, nestle and Cadbury Schweppes.

This season we cross America from Broadway to Hollywood where dance legends Fred Astaire and Ginger Rogers created the Hollywood film musical in the 1930s.