This is the UK X Factor, James Arthur's version on Tulisa's Young. The chords are very 
simple. Put a capo on the 4th fret with standard tuning and just repeat:

Verse 1:
       Em7                             D/F#
I said forgive us for what we have done
            Cadd9                         D/F#
Cause we're young, we're young, we're young
       Em7                             D/F#
I said forgive us for what we have done
            Cadd9                         D/F#
Cause we're young, we're young, we're young

And repeat through chorus and verses.


Done.