Erewhon Tap Here To Add Us Weekly As A Trusted Source Add as a preferred source on Google Billy Corgan is whipping up a new speciality beverage for a good cause. Corgan, 58, is teaming up with California-based luxury grocery store chain, Erewhon, to create a new spooky smoothie just in time for Halloween. Us Weekly has all the exclusive ingredient details, as well as where to purchase the drink, what it'll cost you and more. The smoothie's name, OG Goth, is a nod to the legendary singer, songwriter and frontman of The Smashing Pumpkins.