Chaka Khan has canceled her upcoming shows and the famed songstress has entered rehab after an ongoing addiction to prescription pain medication.

The 63-year-old, 10-time Grammy winner was on the lineup to perform at the California State Fair, but informed officials two days prior to her show that she would be entering the inpatient and aftercare facility and would no longer be attending.

“[Khan has] voluntarily entered the program to get healthy and stay that way,” her rep tells the Modesto Bee.

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Chaka Khan in 2015

The star has been outspoken about her battle with addiction and has entered rehab multiple times in the past, and was rumored to be famously feuding with Lindsay Lohan on a past stint.

“The battle of addiction is a serious and long process, which is why I chose to address my use of prescription medications—which came about as a result of the knee surgery I had a few years ago,” she said after the incident, in a post on her website.

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“When and if necessary, I will seek alternative methods and traditional treatment to stay ahead of any potential problem,” the former Dancing With the Stars contestant wrote. “So many are not here today, and have lost this battle with addiction. Because these medications are legal, their abuse is often unknown—until it’s too late. If not handled they are a silent killer.”

The star was a friend of the late Prince, who passed earlier this year from an accidental opioid overdose.