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Ke$ha Thrust Into Downward Spiral After Split From Secret Boyfriend, Music Video Director Darren Craig

While Ke$ha battles an eating disorder and possible alcohol abuse in rehabRadarOnline.com has exclusively learned a heartbreaking split with her secret boyfriend sent the “Timber” singer on a downward spiral that eventually landed her in a treatment facility.

According to an insider, Ke$ha, 26, was involved in a romantic relationship with her “C’mon” music video director, Darren Craig, for more than a year before the two split last summer.

“Ke$ha definitely was having some ‘issues’ since this past summer after breaking up with her boyfriend, Darren Craig,” the insider told Radar.

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“He’s her video director that she was dating on the down-low for over a year. He WAS married with kids, and a really nice guy, but the last person you would probably see her dating; older divorcee with kids.”

Ke$ha’s distaste for her ex was evident during an interview she did last September with MTV in which she ripped Craig — without naming him — as the inspiration for her new song, “U Suck Ass.”

“Right now [my new songs are] more dude-oriented, because I recently had this boy just be a total piece of sh*t, douchebag piece of garbage [to me],” Ke$ha vented. “He’s just a lying sack of sh*t, balls, sh*t-filled ballsack, he’s just a giant pair. And he has a tiny penis, and he sucks real bad, so I’m writing about that.”

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But she didn’t stop there — hitting below the belt.

“I blocked him, because he was being such a f**king psychopathic piece of garbage dogsh*t. So I wrote a song called ‘F**k You,’ but then that title was already taken, so ‘U Suck Ass’ is another title. It’s talking about fake orgasms every time I had sex with him, and how I pawned all the diamonds he bought me in Vegas and bought some Chanel earrings.”

Now, the Tennessee-native has ended up in Timberline Knolls in Illinois — because the insider says she turned to alcohol after the toxic breakup with Craig.

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“She’s in rehab for a dual diagnosis. She definitely has some emotional issues, bad anxiety attacks and mood swings,” the source told Radar.

“Once last year her team had to charter a private jet to get her to show in Syracuse because she had a breakdown and refused to go. Drinking was a way of self-medicating for her.”