Related Clues:

• See 20-Across
• Hall & Oates, e.g.
• The Carpenters, e.g.
• Sonny and Cher, e.g
• Simon and Garfunkel, e.g
• Hall & Oates, e.g
• Pet Shop Boys, e.g
• The Carpenters, e.g
• Hall and Oates, e.g
• Wham! or Roxette
• The Chainsmokers or Eurythmics
• Hall & Oates or Sonny & Cher
• Tegan and Sara, for one