Ch-ch-ch-ch-changes. A computer analysis of pop hits spanning 1960 to 2010 identifies three turning-point years in the evolution of music. Got any guesses?

Here's a guide to the history of 20 genres that are recognized at the Grammy Awards. We also rounded up some of the discontinued categories.

But what you might not know is that in South Korea, K-pop is being given a run for its money by another style of music topping the charts. A genre with a 100 years of history that's riding a wave ...

On June 22, 1991, Billboard announced a new album had surpassed Out of Time, by R.E.M., to become the most popular in the country. Billboard had published an album chart for 45 years, but this ...

On June 22, 1991, Billboard announced a new album had surpassed Out of Time, by R.E.M., to become the most popular in the country.It was Niggaz4life, by N.W.A., which had debuted the previous week ...

Swamp pop is one of Louisiana's unique and popular forms of music. For more than 60 years people in southern Louisiana and southeast Texas have been creating and enjoying this version of Cajun rock.

A Brief History of Genre at the Grammys. Music is constantly changing, as is how it's classified. The Grammys have tried to keep up, with varying results.