It was announced Tuesday that former San Jose resident Stevie Nicks, who also happens to be one of the greatest living singer-songwriters, will appear on the latest (and thus far best) installment of American Horror Story. (This season is all about witches, so the cameo seems more than fitting.) But, as many have wondered over time, is Ms. Nicks a real witch? No idea. But here Stevie performs "Sisters of the Moon" with Fleetwood Mac in 1982, when, during the song's coda, she starts speaking in tongues.

It's brilliant. Enchanting even. And then, just when you think she can't take it anymore, she twirls.