Taken from an interview with Jim Reid by NYROCK...
NY Rock: Sometimes your lyrics are pretty melancholic. Isn't it a bit strange to sing a sad song, especially if you're feeling great at that particular moment?
Jim Reid: Not really, because a depressing song can make you feel really depressed, so that's OK. Don't take the lyrics too seriously...
I really do feel more like drinking now. I gave you all the answers I have. If you need more just make them up...