Rihanna, Miley Cyrus & Eva Longoria Parker Hit MTV Europe Awards 2010 (PHOTOS, POLL)

Rihanna, Katy Perry and Ke$ha took their acts -- and their style -- to Madrid on Sunday night for the MTV Europe Awards. Each lady had at least one costume change, but host Eva Longoria Parker took the sartorial cake, switching her outfit at least ten times. And Katy Perry ripped her skirt off of her at least once. Those crazy Europeans!

Take a look at pictures of everyone's ensembles and tell us who was best-dressed and who was too boring.