Selena Gomez's mom think she has the cure for her daughter's Bieber fever!

Just weeks after Selena, 24, completed a short stay in rehab, the former Disney Channel star's mom, Mandy, is having secret talks with her ex Justin Bieber — and asking him to leave her daughter alone!

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"Her family feels that no one has ever gotten under her skin like Justin and, ultimately, he affected her in a deeply negative way," a source told Life & Style exclusively. "Mandy really believes that Selena will be able to heal faster without him."

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It's been a hard year for the "Hands to Myself" singer, who opened up about her struggles at the American Music Awards last November.

"I had to stop, because I had everything and I was absolutely broken inside," she said on stage. "I kept it all together enough to where I would never let you down but I kept it too much together to where I let myself down."

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Life & Style previously reported her breakdown was linked to her relationship with Justin, 22, who continued to play a huge role in her life after their breakup in 2015.

"Justin is such poison to Selena," an insider revealed. "Even when he isn't around, she is still self-destructing because of him."

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The source continued, "Her addiction to Justin is what everyone is afraid is going to take the ultimate toll. Justin takes her to a dark place mentally, and she really can't let go."

However, it seems her mom won't have to worry much longer. Selena was recently spotted [kissing fellow singer The Weeknd in paparazzi photos that have her fans talking.

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Meanwhile, Justin is happily single, declaring his relationship status on The Ellen Degeneres Show.

"I'm not really looking either," he added.

We're rooting for you Selena! For a look back at her hottest Instagram moments, click through the gallery below!