is back!

After completing a two-month treatment program for an eating disorder, the "Timber" singer has left the facility and says she's feeling "blessed" to be on the mend.  

The 27-year-old shared a picture of herself on Twitter, looking out the window of her plane. She's sporting a new look -- a rainbow-colored 'do!

"Happy to be back! Feeling healthy & working on tons of new music. I can't thank my fans enough for all the love & support u have given me," the songstress tweeted. "Life is beautiful. I'm so blessed to have u all," she added.

When Ke$ha sought treatment in January, the pop star said in a statement, "I'm a crusader for being yourself and loving yourself but I've found it hard to practice." 

She extended her 30-day stay in February and postponed her spring tour to focus on getting "my health back on track.

"All of your support has been so amazing. I couldn't have done this without you all. I look forward to coming back stronger than ever on the next tour," she added.

The concert dates, which were scheduled for March and April, have not yet been rescheduled.

We're so happy to see that she's healthy and happy!

Click "Launch Gallery" above to see Ke$sh'a best Twitpics.

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