E-Trade Financial's spot featuring a baby being fitted for a suit by an Italian tailor created the most buzz online, per a Zeta Interactive report. Eight of the top 10 buzz-generators launched at the Super Bowl, up from only four in 2010. Auto ads for Volkswagen, Chrysler, Mercedes-Benz and Nissan's Leaf took the category lead. That's a "reflection of coming out of the recession and the car industry taking a bigger role in 2011," says Zeta's Minna Rhee.

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