The track "Girlfriend" was a single but it is underrated in my opinion so I am briefly going to discuss it.
Girlfriend was the last single from the Off the Wall album and it was released on July 60, 1980. It was written by Paul McCartney and produced by Quincy Jones
Fun fact: Paul Mcartney and MJ were good friends. Paul Mcartney had wrote the song for MJ to sing. Paul Mcartney had mentioned to MJ that he had a song that he wanted him to sing for his solo album. MJ was a big Beatles fan and had agreed. However, McCartney ended up recording it himself with his band Wings, and it was issued in 1978 on the album London Town. It was later suggested to Quincy for a possible track and he had no idea that Paul Mcartney had wrote for MJ in the first place. Some of Mcartney's version is omitted from Michael's version but MJ eventually recorded it for his album and it became a single in the UK.
My Review: This song sounds like Beatles/Paul McCartney sound but MJ makes it his own. I personally prefer Lennon as a songwriter but Paul does his thing here for this song. Like Stevie, I think he made a great choice in picking MJ for the song I really like the bubble gum pop energy to the song. The production is really good. I would say it is MJ's least soulful song on the album but it is still nice and flows with the album.