The Flying Pickets is a British a cappella vocal group, that had a surprise number one hit in 1983 in the UK singles chart, with their cover of Yazoo’s track - "Only You".
This song appears in the last scene of the Wong Kar-Wai’s film "Fallen Angels".
More info:
http://en.wikipedia.org/wiki/Flying_Pickets
http://en.wikipedia.org/wiki/Only_You_%28Yazoo_song%29
http://en.wikipedia.org/wiki/Fallen_Angels_%281995_film%29