Super Bowl ad preview -- with a side of pizza

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T-minus seven days until football's biggest game of the year -- the Super Bowl.
A new study shows half of all Super Bowl viewers are in it for the ads, but unlike years past, advertisers aren't waiting for the big game. Many have already hit the Web with sneak peaks and even a few full versions of their ads.  

If you'd like to check out the Mercedes Tweet Up campaign go to: http://t.co/4Q8w49e

 When you sit down to watch the ads, chances are you'll be putting back a slice or two of pizza as well.  Mark Weeter from zpizza in Phoenix joined Tess Rafols and Ryan O'Donnell to share which pizzas are the most popular on game day.