Readers' Poll: Which Singer Has the Most Unique Voice?Selections include Tom Waits, Axl Rose, Robert Plant and Geddy Lee
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7. Janis Joplin
Without a doubt, Janis Joplin was one of the most powerful and dynamic singers of the 20th century. Her career was incredibly brief, but she made the most of her time. For proof of her Axl-like range, check out this live performance of "Cry Baby" from Festival Express. This was just a few months before she died. It's wild to imagine what she could have accomplished had she lived longer.