SOTW: From Simon and Garfunkel

This week's song of the week is one of Simon and Garfunkel's greatest hits. The 59th Street Bridge Song (Feelin' Groovy) features a nice little duet with great harmony. The last 2 measures of the song sound incredibly familiar, but I just can't place it. Please let me know if you have any thoughts.

http://spreadsheets.google.com/pub?key=pbpwnTzCeQnp5v2aGNo9nAw