Sometimes there are strange symmetries in death, as in life. The twin passings of Sly Stone and Brian Wilson this week ...

Paul, 82, who performed with the late musician on A Friend Like You on Brian's 2004 solo album Gettin' In Over My Head, took to Instagram to remember his friend's 'musical genius'.

Alongside George Martin, The Beatles managed to create a "new art form". It was celebrated by their fellow rock 'n' roll bands, but did one band kill it?