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 www.cbs.com/brooksdunn 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)