Several festivals were left with a large void in their lineup, specifically in their headlining slots, following the health concerns of Swedish star Avicii. One of these festivals included Insomniac’s Escape: All Hallow’s Eve. The event is set to take place on October 31st and November 1st in Southern California. Interestingly enough, trance legend Armin van Buuren was slipped into an innocent conversation on Twitter that caught Pasquale Rotella’s attention. The Insomniac boss decided to take action and officially swap out Avicii for Armin to close out the festival on Saturday night. We highly suggest you also take a look at the other performers taking the stage at this festival as it will be a Halloween party not to be missed.