She’s gearing up for the new season of “Nashville,” and last night (August 28) a

When asked about the safety of such an activity, Hayden began, “They’re safe when you have a 110 pound girl on it. When you add a 245 pound Ukrainian on the back it doesn’t go so well… This thing started sinking. I kid you not.”

And when Letterman flashed to a picture of Panettiere next to the much-taller-and-larger Klitschko, Hayden protested, “To be fair, I am on the opposite side of him!”