Blair Witch 2 (2000)
Keep your eyes on the computer screen, and you'll see Erica's boob tube boobs appear as Morticia Addams and The Poor Man's Agent Mulder look on.
Erica twirls around in the dark outside wearing nothing but black unders, and flashes her itty bitty titties once.
During a gothic hoedown jamboree, she doffs her bra and panties to shimmy down by the fireside totally starkers. Be-WITCH-ing (albeit brief) full-frontal!