Just take a look at some of these matchups:  Katy Perry vs Lady GaGa vs Kesha (Wow now thats a triple threat) Britney Spears vs Christina Aguilerra, Beyonce vs Destiny's Child, Mariah Carey vs Jennifer Lopeza there all there and a few more surprises check this link out for the ultimate rivalrys for divas.  http://music.msn.com/dueling-divas/photo-gallery/feature/?GT1=28102&photoidx=1

You can add Courtney Love vs Madonna or Courtney Love vs Tabitha Soren to the list too!