Katy Perry suffering knee pain

Katy Perry is suffering from chronic knee pain and has taken to having acupuncture three times a week in a bid to save her ailing joints. The 'Roar' singer - who recently performed her ballad 'By the Grace of God' at the Grammy Awards - has revealed her constant performing has taken its toll on her body and she has resorted to multiple sessions of acupuncture each week in a desperate bid to save her knees.