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Ke$ha's mother has checked herself into the same rehabilitation center as the pop star.

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Pebe Sebert claims she is suffering post-traumatic stress disorder and has entered the treatment facility where her daughter is being cared for near Chicago.

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Sebert tells People magazine, "I'm checking myself into Timberline Knolls today for post-traumatic stress disorder, at Ke$ha's urging."

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The "Tik Tok" hitmaker entered the residential rehabilitation center earlier this month to seek help for an eating disorder.