Listen to I Could Have Danced All Night (Karaoke Version) [Originally Performed By My Fair Lady (Musical)] online. I Could Have Danced All Night (Karaoke Version) [Originally Performed By My Fair Lady (Musical)] is an English language song and is sung by Ellen Lang. I Could Have Danced All Night (Karaoke Version) [Originally Performed By My Fair Lady (Musical)], from the album Discover Karaoke, Vol. 15, was released in the year 2017. The duration of the song is 2:30. Download English songs online from JioSaavn.