This one

The verses, not so much thankfully, but I've been going through a tough time recently with a rubbish job and a whiney, childish ex. I was out on a night out with my friends (my ex happened to be in the same bar) and this song came on, and I was singing (yelling?) along with the person who was singing (it was a karaoke night), and generally acting as though my ex's presence didn't bother me, even though it did.