Is Paris Hilton gearing up for the Kentucky Derby?! The reality heiress put on a show for the paps in Los Angeles yesterday afternoon, trying on various hats at a store on Melrose.

Those lids are nice and all, but none of them are nearly big enough for Derby standards!  I believe that an official Kentucky Derby hat must be at least 3 feet in diameter and be deep enough to hold 4 Mint Juleps^*; Paris, you must go bigger!

_{*I just made that up, but, I do know that the hats those Southern belles wear are GINORMOUS.}