Billie Eilish & Colin Farrell Hit Halloween Horror Nights for Spooky Event of the Season

Halloween Horror Nights at Universal Studios Hollywood always serves up Southern California's scariest Halloween event and this year is no different! Celebrities like Colin Farrell and Billie Eilish have come out in droves this season as well as Abigail Breslin, Adriana Lima, Alesso, Amber Rose, Barbie Ferreira, Bebe Rexha, Bella Thorne, Big Sean, Clea Duvall,