原來我一直很快樂

原來我一直很快樂 is a melancholic song by 蔡妍 with a tempo of 133 BPM. It can also be used half-time at 67 BPM or double-time at 266 BPM. The track runs 4 minutes and 9 seconds long with a D key and a major mode. It has average energy and is somewhat danceable with a time signature of 4 beats per bar .