Instrumental Duet Cello,Instrumental Duet,Viola - Level 3 - Digital Download SKU: A0.812577 By The Turtles. By Alan Gordon and Garry Bonner. Arranged by Christopher Bell. Oldies. Score and parts. 7 pages. Silent Home Records #6438251. Published by Silent Home Records (A0.812577). The Turtles' hit Happy Together. Approximately 2.5 minutes long. Key of A Minor. Both parts are a level 3. Viola has the melody most of the time, cello gets it in verse 2. A really fun song for a student duet. Both parts are a level 3. Viola has some double stops, pizzicato. The cello part has some extensions. Both feature some fun melodic minor and switch to the relative major as well as the parallel minor.