The 26-year-old is currently in rehab receiving treatment, and despite not having internet access still managed to thank her loyal supporters for their well wishes.
Enlisting a friend to post a message from her official Twitter account, Ke$ha wrote, "THANK YOU. SOOO MUCH. I'm overwhelmed to tears by all of the love, letters, and support!! I'll be back soon and better than ever."
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Her pal added, "Ohhh and she can't believe Timber is still number one! (expletive) YEAH animals! PARTY ON!!!!"
Ke$ha checked into a rehab centre near Chicago on 3 January for what her mother revealed was treatment for anorexia and bulimia.
Mum Pebe Sebert revealed that her daughter had "nearly died" as a result of the disorders.
Kesha performing at a concert in Amsterdam
"(The doctors) told me her blood pressure and sodium were so low they'd never seen that, except with someone who's had a heart attack to a stroke," she told People. "They said it was a miracle she hadn't dropped dead on stage."
Pebe, 57, claimed that Ke$ha's problems stemmed from "bullying" by her management team.
About a week after the singer checked herself into Timberline Knolls facility, her mum did the same, blaming post-traumatic stress disorder as the cause.