What time does the Super Bowl start and what ads should you look for?

Super Bowl XLV, Green Bay Packers versus Pittsburgh Steelers, is fast approaching. On Sunday, large-screen TVs across America will be tuned in to watch the two teams play for the 2010 NFL championship.

The Packers are the NFC champion, and are two- to three-point favorites, while the Steelers are the AFC champion and will be playing as underdogs for the first time since Super Bowl XXX.

So, what time does the Super Bowl start? While kickoff time is set for 6:25 p.m. EST at Cowboys Stadium in Texas, the Fox pregame show will run from 2 p.m. until 6. The pregame will include red-carpet interviews by Ryan Seacrest, performances by Willie Nelson and Alicia Keys, a preview of the halftime performance, and a reading of the Declaration of Independence.

But that's not what the 15 percent of viewers who tune in solely to see the ads care about. They want to know what $3 million for 30 seconds of advertising buys.

In fact, fully 50 percent of viewers will keep the volume up and actually watch the famously expensive ads.

E*Trade has already sent people scrambling to create their own "baby mail," based on the talking baby ads that have been running for years and will make a showing in this Superbowl.

As usual, star power will play a role in Super Bowl ads, with singers, reality TV personalities, and actors making appearances.

Justin Bieber and Ozzy Osborne have teamed up to create an ad for Best Buy that's sure to be very futuristic.

Reality TV star Kim Kardashian will appear in a Skechers ad, and Faith Hill will star in a Teleflora ad.

Eminem will be featured in a Brisk ice tea ad that uses a puppet likeness of the rapper, and comedians Richard Lewis and Roseanne Barr will wield chainsaws in a Snickers ad.

PETA, which regularly recieves press for being refused by the networks airing the Super Bowl, made a follow-up ad using bloopers from a previous submission. Viewers will not be seeing the bloopers ad, as Fox, unsurprisingly, refused to run it.

Expect to see ads created by web users, as Pepsi-Cola offered fans a $5 million prize for the winning submision of a home-made ad.

Fifteen films will show ads during the pregame and the game itself.

Groupon, Anheuser-Busch InBev, GoDaddy.com, Coca-Cola, and Hyundai have also reportedly commited to advertising time.

Many of last year's ads can be seen online.