Charlie Puth on Good Morning America ft. KORG Grandstage and KRONOS

Charlie Puth, American singer songwriter with 110 million views for his hit song “How long” performed this week on Good Morning America with his KORG Grandstage (his support keyboardist uses a KORG KRONOS)

http://abcnews.go.com/GMA/video/charlie-puth-rocks-hit-long-live-gma-51154177