The music powerhouse you've never heard of

The music powerhouse you've never heard of
With 17 Grammys, five gold records and -- by his count -- almost 130 albums, polka superstar Jimmy Sturr might just be the most successful musician you've never heard of. Sturr and his orchestra, superstars in the polka world, are one of a multitude of musical acts nominated this year in some of the lesser-known Grammy categories.