The amazing story of The Zimmers continues with the popstar pensioners taking America by storm. Brought together by presenter Tim Samuels, the 40-strong group became a global sensation with their version of The Who's 'My Generation' but, despite millions of people watching their video on the internet, cannot get radio stations to play their single. So can appearing next to George Clooney on America's biggest talk show help them break into the charts back home?