Fans of country music duo Brooks & Dunn are getting the chance to pick the performers' song for the final time they play together at the Academy of Country Music Awards next month.

Singer-guitarists Kix Brooks and Ronnie Dunn announced a year ago they would be splitting after more than 20 years, following their farewell tour The Last Rodeo this summer.

Brooks & Dunn, the best-selling duo in the history of country music, with album sales of more than 22 million, will perform a song chosen by fans for their Academy of Country Music Awards appearance in Las Vegas on April 18.

Broadcaster CBS said fans could log on to starting on Wednesday to vote on a list of six of their more than 50 hit songs, including Brand New Man and My Maria.

Brooks & Dunn, who have already won a record 26 awards from the Academy of Country Music, are nominated this year for top vocal duo. They also will be presented with the Academy's Milestone Award for their 20-year career.

The duo joined forces in 1990 but said in April 2009 that it's just time for a split.

(Reporting by Jill Serjeant; Editing by Bob Tourtellotte)