It sounds like things are getting pretty serious between Camila Cabello and Shawn Mendes!
The young pop stars were spotted packing on the PDAin Miami, Florida, on Monday, and now, a source tells ET that the two are "committed to working on a relationship."
"Shawn and Camila originally were just enjoying spending time together and having a summer fling," says the source. "Camila had just got out of a relationship and Shawn was in the middle of a massive tour."
"However, Shawn and Camila have really fallen for one another," the source adds, noting that the former Fifth Harmony star has been traveling with Mendes throughout his tour.