"I just got a call from him about two months ago just saying, 'Yeah I've been trying to get you a slot playing on the Grammys.' I was like, 'Okay, cool!' Should be fun."

While Ed's no stranger to having duet partners he's curious at how rehearsing with Elton will take place.

"I've dueted with a lot of musicians in the past. Rehearsing with them you just invite them around your house, have a cup of tea and a play," he said. "How do you rehearse with Elton John? What do you do? He basically only plays one piano so it has to be his piano and I have to go to wherever that is."