Related Clues:

• Song for Simon and Garfunkel, e.g.
• Two-star performance?
• 'Don't You Want Me, Baby?' e.g.
• The Indigo Girls, e.g.
• Half a quartet
• Comic skaters Frick and Frack, e.g.
• Rock's They Might Be Giants, e.g.
• Bill and Hillary Clinton, e.g.
• The Smothers Brothers, e.g.
• Operatic piece
• 'Say Say Say,' say
• Love song, at times
• Ark unit
• Any Sonny and Cher song
• Performance that takes a second