TheSingingMixer: Here's our #RJandtheMixer submission for the #Duetchallenge! We've #collab'ed so much, we picked 1 song that felt really special: #billyholiday's #loveforsale has a brilliant combination of cheerful music, but soulfully world-weary lyrics that really worked for us! If a #duet is 2 people exploring a song together, it doesn't get purer than this! #popup #popupchallenge #acapella #acapellaapp #joinmycollaboration #cover #joinedinmusic #musicwithoutborders! #tsm