Indigo Girls have long been a force to be reckoned with. Originally from Atlanta, Georgia, Emily Saliers and Amy Ray began performing together as high school students. Active as a group since 1985, they have now amassed an amazing 16 albums as a duo, winning a Grammy for their self-titled album.
Apart from their undeniably inspiring musical output, they have also been no slouches in using their voices for things other than singing amazing songs. The team are unstoppable activists, having, amongst other things, supported Native American and environmental issues by founding the non-profit group, Honor The Earth.