Are we human? This ain't a burning question for Sir Paul who is definitely human, for he could not resist the urge of jumping onstage with The Killers as they performed at Royal Albert Hall last month.
According to thesun.co.uk, the 66-year-old McCartney met the band when they performed.
Later, Sir Paul told the group that he would love to work with them.
A source close to McCartney said: "Paul had a great time at the gig. He loves their music and their great attitude."
"He was as pleased to meet them as they were to meet him but they were gobsmacked when he said he'd love to do something with them music-wise," the paper reported.