8. KatyCats (Fan Base Of Katy Perry) This image appears in the gallery:Battle Of The Fans: Capital FM's Top 10 Fan Bases In Pop Music 10. 8. KatyCats (Fan Base Of Katy Perry) Katy poses with a pair of devoted KatyCats at her perfume launch. 42 images See the full gallery: Battle Of The Fans: Capital FM's Top 10 Fan Bases In Pop Music