Paris is cohosting the Barnstable Brown Derby Eve bash with boyfriend Doug Reinhardt. The charity gala donates money to benefit diabetes research.
Kim is on duty at the Derby Spectacular shindig at Glassworks (hosted last year by Jenny McCarthy).
So how much do you have to pony up to get into their parties?
Tickets' to Paris' bash are $950 each, and the event is already sold out. Kim's soiree is a bit more affordable, with tickets starting at $125 a pop.
Whose party do you think will be better: Paris' or Kim's?