You can add Paul McCartney's ex-wife Heather Mills to the list of people who seem to think he's been expanding his list of collaborators in an effort to remain relevant.
It's hard to argue with success, so the next time someone gives Paul McCartney guff for collaborating with Kanye West and Rihanna on their recent "FourFiveSeconds" single, he can just point to the pop chart.
Paul McCartney, Rihanna and Kanye West will give the first-ever performance of their new song ‘FourFiveSeconds’ at the 57th Annual Grammy Awards on Sunday.