Katy Perry could really hear her fans 'Roar' last night ... probably screaming out in horrible pain -- 'cause one of them touched a transformer and ended up on fire, and nearly disfigured the pop star's face with sparks.
Katy Perry Hit by Sparks When Autograph Seeker Touches Transformer, Igniting Elbow | TMZ Live
Katy Perry could really hear her fans 'Roar' last night ... probably screaming out in horrible pain -- 'cause one of them touched a..
TMZ