"I help manage him, and I believe so much in this guy," John recalls telling the showrunners of Sheeran's talent. "[I said,] 'He's gonna be a huge star. What if I do a duet with 'The A Team'? … And that's how we got Ed onto the GRAMMYs."
Watch Sheeran and other artists discuss the most memorable performances in GRAMMY history on the TV special "GRAMMYs Greatest Stories: A 60th Anniversary Special," airing Friday, Nov. 24 from 9–11 p.m. ET/PT on CBS.