Update Dec. 17, 2013: On Tuesday, after the video of the incident went viral, the NRJ Awards shouldered the blame: “Katy Perry sang live during the NRJ Music Awards in Cannes on Saturday night, but unfortunately a bad soundtrack was accidentally launched, taking over the live performance of Katy at the beginning of the delivery tube of the ‘Roar,’” a statement read, translated from French to English by Google Translate. “TF1 and NRJ present their apologies to Katy Perry … for this technical problem beyond our control.”
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If you hear that “Roar” loud and clear, it might actually be a backing track.