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One onstage moment made <\/span>Katy Perry<\/strong><\/a> roar with pain.<\/span><\/p>\n As the \u201cFirework\u201d singer continues the Canadian leg of her Lifetimes Tour, she shared a look back at her life lately, including a mishap from one of her concerts that left her with a bloody knee.<\/span><\/p>\n In her Aug. 6 <\/span>Instagram<\/span><\/a> roundup, Katy posted one snap of a massive, bloodied gash on her right kneecap as her legs rested on the rim\u00a0 of a bathtub. Around her knee, other bruises appeared in a circular pattern.<\/span><\/p>\n \u201cIt was a slide on my knees mome that usually makes them go ahhh,\u201d the \u201cTeenage Dream\u201d singer texted her friend in the next slide, \u201cand it just made me go arghh.\u201d<\/span><\/p>\n Other moments from the post include a snap of Katy and her ex <\/span>Orlando Bloom<\/strong><\/a>\u2019s 4-year-old daughter <\/span>Daisy<\/strong>, as well as a video of the toddler performing a puppet show.\u00a0<\/span><\/p>\n The former <\/span>American Idol<\/span><\/em> judge simply captioned the post, \u201cWe continue to be on tour.\u201d\u00a0<\/span><\/p>\n<\/div>\n