The latest in brand-boosting Twitter stunts is the first-ever “twéance” - an interactive séance that will be taking place on Twitter the day before Halloween (October 30).

U.K.-based Halloween costume store FancyDress.com is the force behind @tweance, which will enable Twitter users to communicate with deceased celebrities via popular British psychic medium Jayne Wallace and, perhaps, meander onto FancyDress.com to scour their assortment of Simon Cowell face masks.

Pretty spooky stuff. But I guess we can say the stunt is working, since it’s already creating quite a buzz on our side of the pond. More importantly, this little shenanigan revealed (was I the only one not in-the-know on this one?) that the social media-savvy psychics among us have been using Twitter as a fortune-telling medium long before FancyDress.com cooked up their little plan (you better be good, @earthshod!).

Which deceased celeb would you want to summon via @tweance? I’m thinking Princess Di. I want all the juicy details of her “murder” (now that she probably knows whether it was really set up or just an accident). The answer to that one should create quite the global stir!

-Andréa S.