Selena Gomez and Joe Jonas' band, DNCE, are on tour this summer—as are Demi and Nick.
Plus, all four of them have singles steadily holding high spots on the music charts.
Now fresh off of a breakup with One Direction's Harry Styles, it's time to play a familiar game: Which song is about Taylor's ex?
We plowed through some of Swift's biggest hits and matched the lyrics to 10 of Swift's high-profile (reported) former relationships.
[hands Miley a whiteboard; she starts writing something] Now if you need to say anything for the next couple of days, just use that.