Lady Gaga reveals the dual nature of her blood-sucking character The Countess in a stylish, fast-moving new promo spot for "American Horror Story: Hotel," set to Rammstein's "Du Hast."

As the owner of the titular Hotel Cortez, The Countless is at the center of the mystery, and wrong-doings, in the fifth season of FX's hit anthology series.

She's joined by an all-star ensemble cast that includes Sarah Paulson, Kathy Bates, Angela Bassett, Wes Bentley, Matt Bomer, Chloë Sevigny, Denis O’Hare, Cheyenne Jackson, Evan Peters and Finn Wittrock.

"American Horror Story: Hotel" premieres Oct. 7 on FX.