We are looking back at the 20 singers that Black Sabbath's Ozzy Osbourne called the greatest of all time and how they ...

Flip through the slideshow below for a look at the all-time great voices in music, ranging from R&B icons to opera stars, pop chanteuses and everyone in between.

Billboard counts down the best country acts of the past (almost ... members of the Billboard editorial staff selected their top artists from a list of nearly 200 names spanning the past century.

There’s no shortage of talent in the list of names that Robert Plant has worked with. Aside from his Led Zeppelin bandmates, he has a host of credits.