Earlier this summer, Ross voluntarily entered a drug and alcohol rehab facility to “clear up some personal issues,” according to her publicist.

Paul Bloch said Ross entered the Malibu, Calif., center Promises before touring because “she want[ed] to be in great shape because she is someone who feels a sense of responsibility to her family and her fans.”

At the time, Ross was expected to continue on with her tour schedule as planned, starting with a June 26 show in Germany. No reason was given for the tour’s cancellation.