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Ke$ha's mom says that she feared for her daughter's life.

Pebe Sebert - mother of the pop singer, who checked herself into rehab two weeks ago for an eating disorder - told People magazine she "watched my beautiful, self-confident, brilliant daughter be berated and ridiculed for her looks and weight to the point that she almost died."

She continued, "The doctors told me her blood pressure and sodium levels were so low, they'd never seen it that low except with someone who'd had a heart attack or stroke. They said it was a miracle she hadn't already dropped dead on stage."

Read: Pop Star Ke$ha Enters Rehab for Eating Disorder

On Jan. 3, Ke$ha, 26, released a statement on why she would be going to rehab for 30 days.

"I'm a crusader for being yourself and loving yourself but I've found it hard to practice," she said in her statement, adding that she hopes she will "to learn to love myself again, exactly as I am."

Her mother, Sebert, also checked into rehab one week later for "post-traumatic stress disorder, at Kesha's urging."

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Sebert added that her daughter's eating disorder reached the point where friends and family would follow her into the bathroom.

Related: Why Ke$ha's Mom Checked Into Rehab

"But she could throw up really quickly and quietly," Sebert said. "She'd even take a bag in there so no one could see her bent over the toilet. She was really sneaky."

Sebert said her issues came to a head around the holidays.

"She called me and admitted how much she'd been throwing up, and I just said, 'Okay,'" she added. "I called some centers and Ke$ha agreed to talk to them and liked what they said. She basically cried until we got there three days later."