ABC News

As you know, Kesha is suing former producer Dr. Luke for sexual and physical abuse, and while he filed a counter suit for extortion, the battle rages on!

It's now been revealed that Kesha's mother Pebe Sebert allegedly wrote a nasty e-mail threatening the producer if he didn't let Kesha out of her contract. Here's an excerpt from the message she allegedly sent to Dr. Luke:
    "We, me and Kesha and her friends ... like Lady Gaga, are going to make all of this Really PUBLIC, in the next few days. Luke date raped Kesha when she was 18... Luke gave Kesha pills. She ended up naked in his hotel room 2 days later. No longer a virgin? Do we all want this to come out? Either Luke releases Kesha from all legal contracts, and gives me back all my publishing, or we, Kesha and I, tell the truth."

Additionally, TMZ reports that the singer "spontaneously" started telling doctors stories about Dr. Luke when she was in rehab earlier this year, and sources say the doctors kept notes that will become evidence in her lawsuit.

As for Dr. Luke, his rep said in a statement to TMZ:
    "That's preposterous. Just because someone says something to a doctor doesn't mean they weren't fabricated or part of an overall pre-planned campaign. Her statements are false. It is important to note that these are just the latest in a series of bizarre public statements and actions by Kesha and her mother over the years, including Kesha's claim her vagina is 'haunted,' her drinking her own urine on her reality show, and her mother dressing up as a penis on the television show."