"Everything Has Changed:" that was the name of the duet that Taylor Swift sang with Ed Sheeran.

As to Sheeran's roots, he has a tuneful single playing on the radio currently, probably an original composition of his, called "Castle on the Hill." It is nostalgia for his upbringing in the lyrics.

"I'm on my way
I still remember these old country lanes
When we did not know the answers..."

"I found my heart and broke it here
Made friends and lost them through the years
And I've not seen the roaring fields in so long
I know I've grown
I can't wait to go home"