Ko Yuan-cheng (28 February 1950 – 17 February 2014), better known by his stage names Frankie Kao and Kao Ling-feng, was a Taiwanese singer, television presenter and actor. He is half Chinese and half Vietnamese. His birth name was 葛元誠 (Gé Yuánchéng) and he employed the moniker The Frog Prince (青蛙王子 Qīngwā Wángzi) for more than three decades which was given to him by his close friend, comedian Ni Min-jan. He also had a friend named Chang Fei, who is the host of Variety Big Brother. He was known for the song "Flaming Phoenix" (火鳳凰). During the height of his career, Frankie Kao commanded an appearance fee of NT$240,000 per night. He exited from his singing career at his peak and ventured into business. His business venture went badly and he returned to his entertainment career.Kao died of leukaemia on 17 February 2014 at the age of 63.