WATCH: Kanye, McCartney & Rihanna live at Grammys

It's been the collaboration of the year so far and it got its chance to shine on the biggest stage last night. Following Kanye West's emotive, powerful performance of 'Only One', which features Paul McCartney on record, the rapper was joined by the Beatle and Rihanna for a run through their new track 'FourFiveSeconds'.
While previous rumours that Paul McCartney would have a big production part to play in Kanye's upcoming album have been dismissed, West did confirm on the red carpet that he would be executive producing Rihanna's new one.