The last show of the Serious Moonlight tour, 8th December, 1983, was the 3rd anniversary of John Lennon's death, whom Bowie and Slick knew. Slick suggested a few days prior to the show that they play "Across the Universe" as a tribute; but Bowie said, "Well if we're going to do it, we might as well do 'Imagine'." They performed the song on the final night of the tour as a tribute to their friend.