The band continued the whimsical streak demonstrated on "Now We Are Six" by inviting comedian and actor Peter Sellers to play the ukulele on the closing track, 'New York Girls'. The band decided that it wanted a ukulele on the song, but no one in the band knew anyone who played the instrument. Finally someone remarked that Sellers was known to play it, and they decided to ask him, even though none of them knew him at all. To their surprise, he agreed, and the song became one of only two recordings he made with a rock band. The other was 'After the Fox', recorded with The Hollies in 1966 for the film of the same title.