Selena Gomez reportedly "flipped out" after finding text messages from Kylie Jenner on Justin Bieber's phone.
The 21-year-old singer, who has had an on/off relationship with Justin for three years, ended her friendship with the reality TV star earlier this month after she found out she'd been texting the 'Baby' hitmaker and sending him photos.
A source told RadarOnline.com: "Selena flipped out and there was a huge fight between the girls. She now wants nothing to do with Kylie or [her sister] Kendall."
However, it's not just the sisters that have had the cold shoulder from Selena - who was seen cuddling Justin at the Coachella Valley Music and Arts Festival earlier this month - as she's also dumped the 20-year-old singer.
The source explained: "Selena was also furious at Justin. They're not together right now."
Meanwhile, the 'Come & Get It' hitmaker has recently turned back to her old friends because she wants to focus on her career and doesn't want to be known as a party girl.
The 'Spring Breakers' actress, who spent three weeks in rehab in January, has also been attending church regularly in the hope that it'll help her deal with her depression.
A source said previously: "Selena is trying to change her ways by going to church and more so to avoid going to rehab. She feels like she has a spiritual gap and that maybe that's why she is struggling.
"She learned about the spiritual aspect in rehab when they talked about the Twelve Steps of Alcoholics Anonymous."