And it isn't Paris Hilton, Britney Spears or that other guy I don't want to mention anymore ... it's actually nearly a billion light-years across!

http://www.physorg.com/news107109720.html

University of Minnesota astronomers have found an enormous hole in the Universe, nearly a billion light-years across, empty of both normal matter such as stars, galaxies and gas, as well as the mysterious, unseen “dark matter.” While earlier studies have shown holes, or voids, in the large-scale structure of the Universe, this new discovery dwarfs them all.
Here's some comparision to other "holes" in the universe: http://en.wikipedia.org/wiki/Void_(astronomy)

Fredi