Soundgarden, who will hit DAR Constitution Hall tonight for a sold-out show in support of the album "King Animal," will be making another, less-expected appearance in Washington this weekend: They'll be serenading the president, first lady and a black-tie crowd of about 35,000 others at the official inaugural ball held at the Walter E. Washington Convention Center. With the lineup packed with mostly pop stars including Katy Perry, Usher and Alicia Keys, the one-time metalheads, well, stand out.

It got us wondering: What on Earth will the Seattle grunge band -- who rose to mainstream fame with the 1994 album "Superunknown"  -- play for POTUS? Your best guesses in the comments, please.