Douglas Mason, Getty Images
Few details were available as of Saturday afternoon, but venue marketing director Jenny Holmes told West Virginia's WOWK TV that a makeup date will be announced as soon as possible.
The 76-year-old 'Coal Miners Daughter' singer underwent knee replacement last month. Prior to her surgery, the resilient "First Lady of Country" played through the pain at a concert in Buffalo, N.Y., earlier this year, asking the audience's permission to sit down. She also took the stage in 2009 just days after a bout with the flu.
Watch 'Portland, Oregon'




Taylor Swift Dominates at 2013 Billboard Music Awards
Tim McGraw's 'Superstar Summer Night' Special to Air May 19
Tim McGraw Stops Atlanta Show to Help Ailing Fan
Jennifer Hudson Performs 'Inseparable' With 'American Idol' Winner Candice Glover
Carrie Underwood 'Goats' Hunter Hayes With Blown Away Tour Prank
Miguel and Fan Are 'Okay' After Crazy Kick at 2013 Billboard Music Awards
Stone Temple Pilots Tap Linkin Park's Chester Bennington as New Singer
Trace Adkins Named Winner of 'All-Star Celebrity Apprentice'
Taylor Swift Admired George Jones' Passion for Performing
Lawyer: Steroids to Blame in As I Lay Dying Frontman's Murder-for-Hire Case

133 Comments