I'm pretty excited that this song has finally broken into the Top Ten. It's a dance song in the 80's/90's tradition as opposed to, for instance, the song I played last week. By that, I suppose I mean that it is a little less worried with "looking cool" and a little more into having a good time. You could make the claim that it's repetitive or mindless, but I think it is just so so so fun. I think it looks like they're both having a good time.
Oh, and my theory is that neither of them actually sing on the track. They construct the track and then the voice you hear singing is that of Charlie XCX. But I would love confirmation of this.