I think what makes Katy unique is her out of this world personality. it's super fun, goofy, nutty and refreshing. It's nice to have a pop star who does not take herself so seriously every now and then.
Katy is full of fun and love without an ounce of bad doings in her heart. God gave her the ability to be able to have an ear for hit after hit that the GP can relqte to which is what made her the new Queen of Pop the second she dropped I Kissed A Girl