10/29/2013 at 01:40 PM EDT
Country music legend Loretta Lynn
is postponing two shows in Iowa because of exhaustion.
A statement from Lynn's representative on the singer's website
says the 81-year-old singer started feeling poorly midway through her three-week tour and is taking some time off to be treated.
"Loretta is a pro and wants to give her fans the best show possible," the rep said. "She felt she was physically unable to do that."
The statement says Lynn, who just finished a Canadian tour, is rescheduling both Iowa shows.
Last year, the singer postponed two shows to undergo more physical therapy following total knee replacement surgery.
Lynn was born in the coalfields of eastern Kentucky and chronicled her life in an autobiography and song, both titled "Coal Miner's Daughter."