The 21-year-old singer reportedly cut ties with the sisters after the Coachella Valley Music and Arts festival earlier this month because she thinks they're a ''toxic distraction'' and she thinks they're encouraging her to be a party girl.
However, sources close to the reality TV stars claim Selena, who completed a three-week stint in rehab in January, is the one who is out of control, not them.
An insider told TMZ.com: ''Selena has it twisted - not only do Kendall and Kylie eschew drugs and alcohol ... they believe Selena's the real drama-obsessed party girl. After all, she's the one who's been to rehab.''
The source added that Kendall, 18, and Kylie, 16, ''feel like they're better off without her''.
The 'Come & Get It' hitmaker had formed a close bond with the famous sisters in recent months, but she made it clear their friendship was no more when she unfollowed them on her Instagram account last week.
Not only is Selena convinced the sisters are tarnishing her career, she also holds at grudge against them because Kylie was reportedly getting too close to her ex-boyfriend Justin Bieber, whom she has dated on/off for three years, at the music festival in California.
A source said previously: ''Selena is convinced something has gone on between Justin and Kylie.''
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