Listen to Exercises In Free Love (1987 B-Side) online. Exercises In Free Love (1987 B-Side) is an English language song and is sung by Montserrat Caballé and Freddie Mercury. Exercises In Free Love (1987 B-Side), from the album Barcelona (Special Edition - Deluxe), was released in the year 2016. The duration of the song is 4:28. Download English songs online from JioSaavn.