popduo Sonny and Cher, e.g Pet Shop Boys, e.g Wham! or Roxette The Chainsmokers or Eurythmics Sonny & Cher, e.g Hall & Oates or Sonny & Cher The Carpenters, e.g. Hall & Oates, e.g. Hall & Oates, e.g. Simon and Garfunkel, e.g Hall & Oates, e.g