For the unversed, Paul McCartney and Michael Jackson collaborated on the song ‘The Girl Is Mine’, that got featured in the latter’s album ‘Thriller.’ Then they also worked together in ‘Say, Say, Say’, which was featured in Paul McCartney ‘Pipes Of Peace.’ However, their friendship started souring when Michael Jackson asked Paul McCartney for advice on where to invest his money, and allegedly Paul McCartney asked him to invest in music publishing. Taking that advice, Michael Jackson went ahead to but John Lennon and Paul McCartney’s music catalogue for $47.5 million. That was a huge amount at that time, but this led to the two of them never speaking to each other again.