Millions of Americans will be turning on their TV screens to watch the big game Sunday, but what will they be waiting for: commercials, football, or the mega popstar expected to be in the stands?

Commercials are a big driver of viewership with advertisers putting big loads of cash toward a few seconds of screen time.

A 30-second commercial can come at a price tag of $7 million, according to Greg Gerfen, executive in residence for the advertising program at the Western Michigan University Hayworth College of Business.

Marketers are releasing and teasing their advertising early and releasing it on social media," he explained. "So, the social media views, and the sharing that people do with their teasers in their commercials before the Super Bowl even happens, is another metric that they'll use.

But this year there is a new star in the stands: Taylor Swift.

The mega-pop star is expected to bring even more eyes to the commercials this year, and Gerfen said, she's having a big influence.

"She has such a following of younger female audiences that they are coming to watch the game and so some advertisers that wouldn't normally advertise in the game actually advertising in the game," Gerfen said.

Makeup brands and popular drinks like "Poppi" are throwing money into the hat to get more viewers' eyes on their product this year.