KESHA HELP!!! I'M OUT OF CASH

Kesha has run out of money to fund what has become a very expensive legal battle ... and, no surprise, she's blaming her financial woes on Dr. Luke.

Sources connected with the singer tell us, aside from the fact that Kesha "has been on ice for 3 years," they say Dr. Luke has withheld royalties from her. As a result, she has virtually no income.

We're told Kesha did not solicit money, and Taylor Swift gave her the $250k on her own accord.

Our Kesha sources say so far, no other celebs have donated money.