Musical easter egg? :-) Backing voices to the King's Singers "Heaven... I'm in Heaven..." fittingly echo "In Paradisum" from Fauré's Requiem (*can't* be coincidence?) before they get down to dancing Cheek to Cheek.
(Fauré's ethereal arpeggios were a sign we were in the home straight as his Requiem was a regular feature - along with Vivaldi's Gloria and Handel's Messiah - of the university choral scene which occupied much of my student days.)