Just because you aren't mainstream doesn't make you off-limits for being an amazing vocalist. And just because you get to enjoy the limelight of mainstream radio doesn't necessarily mean you are one. Either way, there are great vocalists on both sides. The only difference? Some mainstream artists have been fortunate enough to share their vocal talent and the others who aren't at that star power yet haven't. One day perhaps these current underrated artists will receive the fame they deserve, but until then, feel free to vote on your favorites so they can at least rise to the top on this list.