Paul McCartney has admitted that he didn’t recognise his own guitar when he first heard his ‘FourFiveSeconds’ collaboration with Kanye West and Rihanna.The 2015 track, which has been covered by everyone from Drake to James Bay, peaked at Number Four on the US Billboard chart, and it helped McCartney set a record by ending the longest break between Top 10 singles on the chart.Speaking on The Tonight Show Starring Jimmy Fallon on Thursday (December 17), McCartney said that he didn’t even know he