I always wondered how Slim Whitman could sell twenty million records before I ever heard of him. -- Tim Sample
Nowaday probably best known as the guy whose voice made alien heads explode in Mars Attacks!, Slim Whitman was huge in the fifties. Huge. Here's his song "Rose Marie," which was #1 in the UK for eleven straight weeks, a record that wouldn't be broken for 36 years.
And here it is as performed on Late Night with David Letterman by Andy Kaufman, wearing a fake mustache, turban and diaper.