Well, earlier this week, Selena and Kygo released a new song entitled "It Ain't Me" -- and, you guessed it, it's about her ex-beau Justin.
The track appears to be the 24-year-old singer's way of saying things are absolutely, positively done between her and Justin.
Proof: the lyrics talk about "a guy she met when she was 17" (Selena and Justin met in 2009, when she was 17), who she has given everything to and done everything for.
Selena concludes the song by saying she "won't do it anymore." So maybe, Selena and Justin are finally over -- again?