Jeon Mido who plays Songhwa the tone deaf bass player is actually a musical actress in real world
Kim Dea-myung actually learned to play the piano for this series, at a children's music school.
Yoo Yeon-seok had played a doctor before in the famous drama "Dr Romantic" and the show is mentioned in this series.
Hospital Playlist is one of the highest-rated series on Korean cable television history (ranked 14th).