Here's something that'll make your stomach rumble this afternoon. Katy Perry has debuted the new music video for her song 'Birthday' which is taken from the singer's fourth album Prism.

The video takes a novel approach on the 'lyrics video' concept, showing the song's lyrics on the various kitchen equipment used to bake a cake. Not a whole lot of Katy Perry in it though! Peep the clip below and let us know what you think.