Buzz News Roundup, 12/19

• Ewan McGregor will play Jim Carrey's love interest in the "dark comedy" I Love You, Phillip Morris, reports Variety.
• E! Online has news that Josh Groban's holiday album sales have broken a record originally set by Elvis Presley.
• MTV and Jerry Bruckheimer are teaming up to make video games, Broadcasting & Cable reports.
• Zap2It reports that Brad Pitt may replace Heath Ledger in the drama Tree of Life.
• TV Guide writes that USA has canceled The 4400 and Dead Zone.
• The Smashing Pumpkins will release an acoustic EP in 2008, NME reports.
• Mischa Barton has signed on for the indie thriller Homecoming, writes Variety.
• Showtime has bought Secret Diary of a Call Girl, a British series based on a sex worker's anonymous journal, Mediaweek reports.
• From the department of weirdness: Michael Douglas is now doing the voiceover for the NBC Nightly News, TV Guide reports.