"New"-Whatever Gets You Through The Night-"Backing Track At Soundback"

The song "Whatever Gets You Through The Night" sung by John Lennon featured another very well known artist,can you Soundback Fans tell me who it was.

http://www.soundback.co.uk/mp3/JOHN-LENNON/Whatever-Gets-You-Through-The-Night/6108.php

Answers on a post please.