Bruce Willis
From Tardis Wiki, the free Doctor Who reference
Bruce Willis was an actor who appeared in the Die Hard film series. Flip Jackson stated that the Warmongers were not exactly crack shots, comparing them to terrorists trying to attack Willis in those films. (AUDIO: The Fourth Wall)
As noted by Nate Simms, Mount Demi had the same name as Bruce Willis's wife. (PROSE: Invasion of the Cat-People)
Jackie Tyler was relieved to learn that a counterpart to Bruce Willis existed in a parallel universe. (AUDIO: The Last Party on Earth)