Pop star Selena Gomez is said to be crushed after her ex-boyfriend Justin Bieber took model Chantel Jeffries on a holiday break and feels he played her.

The 21-year-old, who was said to be getting back together with Bieber, is still annoyed he took Jeffries on a break to Panama with him earlier this week.

"Selena is sad but she's also angry. She feels like Justin played her because just when she was getting some closure and strength he convinced her to come back to him and made all kinds of promises. But it turns out they were all lies and now she's back at square one," a source told hollywoodlife.com.

Gomez is upset that Bieber has changed so much since they first started dating in 2010. "In a way she's mourning because she's realised that he just isn't the guy she fell in love with anymore," the source said.