This is a cool website.
Basically you upload a song or link to a youtube video and you get the chords that are used in the song.
I tried it with Hi and goobye (my song of the day) and this is what came out.
http://chordify.net/chords/a-teens-hi-and-goodbye-ulises-morales-carranza
I'm not a perfect musician but this seems to be quite accurate.
What do the professionals say?
the key change in the last chorus! bliss!