This is a question that many people have been asking since the news of Justin Bieber and Selena Gomez's break-up. While we cannot say for certain what happened between the two celebrities, we can take a look at some of the evidence that has been presented.
According to reports, Justin Bieber and Selena Gomez were seen arguing on several occasions in the weeks leading up to their break-up. One report even claims that Selena was seen crying after an argument with Justin. This could suggest that there was already some tension between the couple before Jessica came into the picture.
Jessica Serfaty is a model who has been linked to Justin Bieber in the past. She was reportedly seen with him shortly after his split from Selena Gomez was announced. This led many to believe that Jessica may have had something to do with the break-up.
However, it should be noted that Jessica Serfaty is not the only person who Justin has been linked to since his split from Selena Gomez. He has also been seen spending time with Hailey Baldwin and Kendall Jenner. So, it's possible that he simply moved on from Selena rather than leaving her for someone else.
At this point, we cannot say for certain what happened between Justin Bieber and Selena Gomez. We can only speculate based on the evidence that is available.