which song written by McCartney was shame said to contains an acoustic guitar part similar to
Shame (Robbie Williams and Gary Barlow song):  It is a pop song with country and electro music influences; two reviewers noted that it contains an acoustic guitar part similar to the one of the Beatles' 1968 song, "Blackbird". Blackbird (Beatles song): "Blackbird" is a song by the Beatles from their 1968 double album "The Beatles" (also known as "the White Album"), which was performed as a solo effort by Paul McCartney.
Blackbird"