Sometimes there is so much emotion packed into a country song, it takes two people to sing it. Country music has a long tradition of duets by superstars that need no introduction - Johnny and June, Dolly and Kenny, Loretta and Conway. Powerful pairs have produced some of country's most memorable - not to mention chart-topping - hits.
In the spirit of collaboration, ABC News' "20/20? wants your help in determining the greatest country music duet of all time. Vote for your favorite duet below and tune in to a special edition of "20/20," "In the Spotlight with Robin Roberts: All Access Nashville" on Tuesday, Nov. 5 at 10 p.m. ET, to find out which song makes the cut.