Just when you thought that True Blood couldn't get any better... they hire Taylor Swift! Well, her vocal talents, anyway.

The country pop singer's track "Haunted," has been confirmed by the show's music supervisor Gary Calamar that it will appear on tomorrow's episode of the hit vampire show, "Run."

Calamar wouldn't divulge the juicy details as to which scene the Speak Now track will play to, but he did reveal that it's "a racy, sexy scene." Given the star's squeaky clean image, Swift's team initially prohibited the song from the episode's soundtrack; however, Taylor stepped in herself and said otherwise.

As for the last episode -- titled "And When I Die" -- Calamar offered some insight as to whom the title may or may not refer to: "Vampires don't really die, so I'll say it's not a vampire. They won't face the true death. But some of our main characters do run into a little bad luck in the final episode."