Okay, okay, we realise this is a piss-take but if you're willing to go along with it, it's quite funny. And it does actually fit quite well, depending on your definition of well. Below is actually a mash-up of Firework and Ono's 2010 vocal performance piece which she did for the Museum of Modern Art in New York, which you can observe in it's native glory right here. It is just Yoko being her loco self and wailing for over a minute though, which must be a torture technique used in warfare. But surely Katy Perry's music is probably used too, so this is more than likely in breach of several United Nations Convention Against Torture provisions.