Listen to Someday Sweetheart online. Someday Sweetheart is an English language song and is sung by Stéphane Grappelli and His Sextett. Someday Sweetheart, from the album Balboa Swing, Vol. 7 (DJ Wuthe am "Grammophon"), was released in the year 2012. The duration of the song is 2:52. Download English songs online from JioSaavn.