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WATCH: 2013 Super Bowl commercials

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With the big game coming up Sunday, several companies have posted ad previews or the entire ad online ahead of the most anticipated sports day of the year.

Watch: 2013 Taco Bell Super Bowl commercial

Watch: Mercedes-Benz 2013 Super Bowl commercial

Watch: 2014 Kia Sorento Super Bowl commercial

Click here to check out the full gallery on CBS

Which commercial is your favorite? Leave a comment below and tell us what you like most about the ad.