Yep, as soon as he started singing Imagine I knew why Simon had given him that song. It worked well. I was reading reviews of all the performances in the NOTW earlier and the writer said this:-
"Little Eoghan Quigg from a little village in little Ireland did something no-one in the past 37 years has ever managed to do.
He sang John Lennon’s Imagine without butchering it.
Year after year, TV talent show after TV talent show, someone tries it and someone murders it.
After pulling that off, viewers can’t help but be a little excited at what he’s capable of."
I guess the writer didn't watch American Idol earlier in the year then