Since then, Charlie has been saying that the song is basically about the ill-fated relationship of Justin and Selena. In fact, the dress line in the duet is a reference to the “Good For You” song of Selena.
It seems that all the things that Selena told Charlie about Justin while they were collaborating on the song stuck with Charlie and the upstart musician decided to side with Selena for her part of the story. The source said that Charlie felt for Selena and he does not like all the games that Justin supposedly played on “The Heart Want What it Wants” singer while they were still together.
The diss by Charlie Puth on Justin Bieber on the former’s concert was actually caught by a fan on video which was later posted on social media.
He made the curse while singing “We Don’t Talk Anymore” then continued on into the chorus of the single. He may have thought that nobody caught that blip on his performance but he later found out that somebody did.
As if to contain the situation, Puth, later on, apologized for the diss in his tweets by saying that it was merely a joke. But realizing later that it could blow the issue out of proportion, he also deleted his tweets of apology.