A curious album, Great Voices Sing John Denver was released today June 11, 2013.

The tracks:

1. Rhymes and Reasons -- Danielle de Niese 2. This Old Guitar -- Rod Gilfry 3. Leaving on a Jet Plane -- Patricia Racette 4. Sweet Surrender -- Thomas Hampson 5. The Eagle and the Hawk -- Zajick, Gilfry, Montenegro 6. Goodbye Again -- Daniel Montenegro 7. Sunshine On My Shoulders -- Denyce Graves 8. Like A Sad Song -- Dolora Zajick 9. Shanghai Breezes -- Shenyang 10. Fly Away -- Stuart Skelton and Bárbara Padilla 11. Follow Me -- René Pape 12. Per Te -- Matthew Polenzani 13. Calypso -- Nathan Gunn 14. Perhaps Love -- Plácido Domingo and Plácido Domingo Jr. 15. Annie's Song -- Cast 16. For You -- Matthew Polenzani 17. Shanghai Breezes (Mandarin) -- Shenyang

Source: http://www.ballantinespr.com/News/Okun/JohnDenver-TrackList.html

A website is devoted to the album.