Mavis Staples: 'We're Not All the Way Where Dr. King Wanted to Take Us'

On the eve of her tour, launching Jan. 15 with a Martin Luther King, Jr. tribute concert, Staples spoke to Spinner about her pivotal role in the Civil Rights movement, her thoughts on hip-hop materialism and her wish that Justin Bieber and Katy Perry would sing inspirational songs that could change the world.

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