Elaine Paige & Barbara Dickson : Wiem, że mu tak dobrze (Rzadko) HQ

Wonderful song from the musical Chess performed on German TV
The duet was number one in the UK for four weeks in 1985 when released as a single by Elaine Paige (as Florence) and Barbara Dickson (as Svetlana), who laid down their vocals separately and never met during the recording of the song, only for the video and subsequent performances on Top of the Pops and the European tours.] This recording remains in the Guinness Book of Records as the biggest selling UK Chart single ever by a female duo. Paige also appeared in the original London stage production of Chess.- wikipedia