Ke$ha is fresh out of rehab and working on new music. The pop star checked herself into the Timberline Knolls clinic in Chicago, Ill,. for anorexia and bulimia in January.

Posting a photo of herself on board a plane, she told fans on Thursday: "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."

She then added: "Life is beautiful. I'm so blessed to have u all."

The singer entered rehab two months ago, saying in a statement at the time, "I'm a crusader for being yourself and loving yourself, but I've found it hard to practice. I'll be unavailable for the next 30 days, seeking treatment for my eating disorder... to learn to love myself again, exactly as I am."

Ke$ha also postponed her upcoming "Warrior" tour to focus on her health. She said in February: "I was so looking forward to performing at these dates but I need to follow my doctor's advice and get my health back on track. All of your support during this time 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 turned 27 on Saturday.