Kesha is postponing tour dates as she completes treatment for an eating disorder, reps for the singer say. The pop star had shows scheduled for March and April.
"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," she said in a statement.
"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."
In January, the 26-year-old checked into Timberline Knolls outside of Chicago, the same facility where Demi Lovato sought help in 2010.
"I'm a crusader for being yourself and loving yourself but I've found it hard to practice," Kesha wrote to her fans on Facebook. "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."
Kesha had dates booked in Indiana and Wisconsin, according to her official website.
Fans who purchased tickets should contact their local box office for refund information.