“Perhaps Love” is a song that John Denver wrote and recorded as a duet with Plácido Domingo. The song appeared on Domingo’s 1981 album of the same title. “Perhaps Love” is the only song on the album with Denver’s vocals alongside Domingo’s. However, Denver also appears on the album’s cover version of his composition “Annie’s Song”, where he accompanies Domingo on guitar. Released as a single with “Annie’s Song” on the B side, “Perhaps Love” peaked at #22 on the U.S. Adult Contemporary chart and #59 on the Billboard Hot 100 in 1982. Remaining in print, the song sold almost four million copies by 2008.[2]”Perhaps Love” was addressed to Denver’s wife Annie Martell (the eponym of his #1 hit “Annie’s Song”) while they were separated and moving towards a divorce. In an interview the day after Denver’s death in 1997, Annie said that this was her favorite song of his, rather than “Annie’s Song” (which she also said she enjoyed). Milt Okun, the album’s producer, first suggested that Domingo, an opera singer, pair with the famous folk singer on the song. The producer worked hard to promote the song after its release.[clarification needed] An independent radio promoter told Okun at the time, “It’s very beautiful, but there’s no chance at all of this getting on the air.” To both men’s surprise, one of the top five radio stations in the United States in Philadelphia began playing the song every hour on the hour, greatly contributing to its success and the willingness of other stations to play it. Okun discussed this with the station owner. The owner told the producer that his “wife was in love with the tenor” as explanation for repeatedly playing the opera singer’s record. Lee Holdridge, who conducted the music on the album, credited the pairing of Domingo and Denver with paving the way for recent “popera” phenomena like the Three Tenors, Josh Groban, and Andrea Bocelli