"The person I'm about to bring out has been so incredibly kind to me over the years," said Swift in her introduction. "This person is one of the greatest entertainers of all time � This person has been knighted."

Swift previously joined the Rolling Stones in Chicago in 2013 for their 1965 single, "As Tears Go By." Keith Richards recently confirmed the band has plans to regroup to record their first new album in a decade.

"I was at a meeting with the lads three or four days ago where everybody said, 'Yes! We must go in the studio!'", said Richards. "Where or when I can't yet say but in the near future. At last I've got the boys wanting to get into the studio.