Listen to Baby, It's Cold Outside (Originally Performed by Celtic Thunder) [Instrumental Version] online. Baby, It's Cold Outside (Originally Performed by Celtic Thunder) [Instrumental Version] is an English language song and is sung by Merry Music Makers. Baby, It's Cold Outside (Originally Performed by Celtic Thunder) [Instrumental Version], from the album 101 Christmas Instrumentals, was released in the year 2013. The duration of the song is 3:35. Download English songs online from JioSaavn.