Taking a page out of Conan O'Brien and the White Stripes' (who have been confirmed for Conan's last show) book, David Letterman has announced that U2 will be taking over his stage for a whole week, starting on March 2 and running through March 6. The band will be promoting their upcoming new album, No Line on the Horizon, which just so happens to be out on March 3. [Idolator]
I think Morrissey did this on Jimmy Kimmel or Craig Ferguson...