In an interview with Esquire that is generating a surprising amount of buzz—and not just because she appears on the magazine's cover in her underwear—TV and film star Megan Fox talks about her Pentecostal upbringing and her experience of "getting the Holy Ghost." Ms. Fox's account of speaking in tongues is proving particularly buzz-worthy, prompting comment in Christian media as well as mainstream news outlets in the U.S. and abroad.

Why the kerfuffle? Didn't we get our fill of this a couple of years ago with similar descriptions by the Pentecostally raised singer Katy Perry? And what does it mean to speak in tongues?