20. The Be Sharps, 'The Simpsons'
In a classic early Simpsons episode, Homer recounts for his children how he was once part of a barbershop quartet that included Apu, Principal Skinner, and Chief Wiggum. Wiggum eventually gets replaced by the surprisingly golden-voiced Barney, who helps The Be Sharps achieve worldwide success. The Sharps break-up when Barney takes up with a Yoko Ono-style woman, but the band reunites for one last rooftop rendition of their hit song, "Baby on Board."