Halloween went Hollywood last night at Project LA, when Complex and Vevo—the world’s leading all-premium music video and entertainment platform—teamed up for a ghoulishly glorious costume party. Over 300 VIP guests indulged in an open bar and fully catered spread before tearing it up on the dance floor to tunes courtesy of DJ Ruckus, Them Jeans, and Lady Sha. Costumes were mandatory and, as you can see in the pics above, everyone took that responsibility very seriously. Get-ups ranged from the sultry to the silly to the downright strange, so be sure to take a look. Happy Halloween!