''Walls and Bridges'' is the fifth official album by English rock musician John Lennon; it was issued on 4 October 1974. Written, recorded and released during his 18-month separation from Yoko Ono (June 1973-January 1975), the album captures Lennon in the midst of The Lost Weekend. ''Walls and Bridges'' was an American Billboard #1 album and featured Lennon's only #1 single as a solo artist during his lifetime, "Whatever Gets You thru the Night", a duet with Elton John. - Wikipedia