It's stuck in my head too.   Such an easy phrase and chorus to remember.    I'm not sure its a good thing or bad thing, but for me, its not a good thing - its an annoying whinny repitition.   I don't even like the background vocals.   I sure hope they decide to release a different first single.   I wonder if they do any audience testing before release.   I'm not negative to a new direction and growth, its just that I know they can do better than this.