Mellow Yellow Paul McCartney can be heard as one of the background revellers on this track, but the "quite rightly" whispering answering lines in the chorus is not McCartney but rather Donovan himself. Donovan had a small part in coming up with the lyrics for "Yellow Submarine", and McCartney played bass guitar (uncredited) on portions of Donovan's "Mellow Yellow" album. In 2005, the track was remastered by EMI Records for the "Mellow Yellow" album re-issue. "Mellow Yellow" was covered in 1967 by soul singer Big Maybelle on her album "Got a Brand New Bag". It was also covered in 1968 by British
This Could Be the Night (1966 song) concert film "The Big TNT Show". Other than the film, MFQ's recording went unissued until 1976, when it appeared on a Spector compilation album. Nilsson recorded the song several times, but only a solo demo has been issued. In 1995, Wilson recorded it for a Nilsson tribute album. Several other musicians have recorded their versions of the song. According to Spector biographer Mick Brown, Nilsson wrote "This Could Be the Night" as a tribute to Brian Wilson of the Beach Boys. Nilsson brought it to Spector, whose productions Wilson greatly admired. Nilsson and Spector are often listed as the songwriters,