Carlton "King" Coleman, a pioneer in American rhythm and blues, died Saturday morning from heart failure at a Miami hospice, his son said. He was 78. Coleman was known for providing the lead vocals on the 1959 hit "(Do The) Mashed Potatoes," recorded with James Brown's band. According to a 2003 Miami New Times article, Brown had initially planned to do the vocals himself, but a dispute with his record label made that impossible. To avoid any lawsuits from Brown's label, a Miami producer had Coleman sing on the mostly instrumental track, while the group officially credited with the song...