text: Pin for Later: Over 250 Celebrity Halloween Costumes! Ashley Madekwe paid homage to Heath Ledger's performance as the Joker in a nurse's uniform at Matthew Morrison's Halloween party in Halloween Costumes Pop Culture, Halloween Costumes Pictures, Best Celebrity Halloween Costumes, Fete Halloween, Last Minute Halloween Costumes, Halloween Outfits, Halloween 2014, Joker Halloween, Costumes Kids