Sumner Redstone's had a little upheaval in recent weeks. First, he had to *fire* megastar Tom Cruise from Paramount Studios since the movie star's recent antics and erratic public behavior has made him a little less appealing to major studios. Although Cruise's agency says the star *fired* Paramount, everyone has super-inflated egos to protect.

Now, Redstone's lost the CEO of the company he chairs, Viacom. Former CEO Tom Freston -- one of the founders of MTV -- has resigned as of today, according to Viacom. He has been replaced already by industry veteran Philippe Dauman, who has held various executive positions as Viacom in recent years, and who heads up DND Capital Partners, LLC, a media and entertainment investment firm. No word on the specific reasons why (yet), but at 60, perhaps Freston just felt it was time.

Along with Dauman, Viacom also named Thomas E. Dooley to the newly created position of senior executive vice president and chief administrative officer. Dooley also co-heads the DND Capital Partners firm with Dauman, so this pair of executives should be able to aptly take the reigns of Viacom, which owns various media properties like MTV, VH1, Comedy Central and the Paramount movie studio, and competes with industry giants like Sony and Time Warner, among others.