It's the most important event of the year for some brands.

Spending more than $4.5 million on an ad is a regular line item for some, but first-time advertisers such as Loctite have forfeited their entire marketing budget for the year on one 30-second spot. 

It's a risk, with the potential for a big payoff. Last year, the Big Game was the most-watched TV event in U.S. history, drawing more than 111.5 million viewers. This year should be no different, especially with Katy Perry headlining the Half-Time Show and the coming together of two high-profile teams. 

Continuing the trend of the past few years, brands began releasing teasers and the full-length version of their Super Bowl ads as early as January 14 to build hype around the campaigns. And while this year's lineup has had trouble competing with #DeflateGate and #Blizardof2015, there's more than a few reasons to catch up on all the ads and teasers released so far -- one reason includes a familiar golden retriever puppy and another reason includes a woman who can "break the internet."

Check out all the ads below: 

Originally published Jan 28, 2015 9:00:00 AM, updated February 04 2015