Katy Perry's Emotional Rock in Rio Set Leaves Fans Roaring Back to Life

Katy Perry closed out her set at Rock in Rio Lisbon, where she shared an emotional moment with the audience. She wore a familiar outfit from her Hello Katy Tour and told fans that she'd lost her 'roar' after years of performing 'Roar'. The crowd erupted into cheers as she performed a haunting acoustic rendition of the 2013 hit.