With an estimated 250 million in album and single sales, Rock and Roll Hall of Famer Rod Stewart arguably possesses one of rock's greatest and most distinctive voices. With that immediately recognizable husky voice, the gravel-toned wonder has successfully commanded nearly every genre of music including folk, rock, soul, R&B, blues and more.

Since her 1988 debut 'Bring Me Some Water', Melissa Etheridge has been an iconic voice in alternative rock and roll. When in 1993, her second record 'Yes I am' went double platinum, that success was cemented. As a performer she has won 2 Grammy Awards and an Academy Award for best original songs, but also as a social and gay rights activist, she has left a lasting impression on American popular culture.