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Thanks for your replies.
I did say I wasn't too sure of the lyrics, and I do now know what the song is.
The lyrics were in fact :-
"How did you find me, came out of nowhere"
not "king" at all - sorry!
It is of course "Amazing" by Matt Cardle.
Could've used Shazam if I had an iphone - which I don't - but I eventually dropped the "king" from a Google lyrics search and hey presto "Amazing" was one of the suggestions. Viewed the video and yes, that's the song!
Thanks all anyway!