NEW YORK (CNNMoney.com) -- If you haven't bought a spot for your Super Bowl ad, then you're too late.
CBS (CBS, Fortune 500), the broadcaster for this year's NFL championship, said it has sold out all the spots for the big game, said spokeswoman Shannon Jacobs on Monday.
It took the company several weeks to nail down the last few spots. CBS reported on Jan. 7 that it was 95% sold out.
A 30-second spot sold for up to $3 million apiece, according to CBS. Super Bowl advertisers get charged a premium because so many people watch the game. Last year was a record high for viewer volume, according to The Nielsen Company, with 98.7 million tuning in.
Anheuser-Busch (BUD) is the top advertiser this year, having purchased five minutes worth of ad time.
Other advertisers include PepsiCo's (PEP, Fortune 500) Frito-Lay division, GoDaddy.com, Coca-Cola (KO, Fortune 500), Chrysler, Volkswagen, Kia, the U.S. Census Bureau and Focus on the Family.
The Super Bowl will be played on Sunday, between the Indianapolis Colts and the New Orleans Saints at the recently re-named Sun Life Stadium near Miami. 
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