The Twitterverse exploded Sunday night after Christina Aguilera fumbled the lyrics to the National Anthem during the pre-game show for Super Bowl XLV.

Aguilera should have sung: "O'er the ramparts we watched, were so gallantly streaming?" but instead repeated an earlier line with a slight variation. She sang: "What so proudly we watched at the twilight's last gleaming."

Although the singer was unavailable for comment straight after the gaffe, she later released a statement to the Associated Press, in which she said that she flubbed the line after getting lost in the moment and losing her place.

During the Super Bowl pregame show (2PM ET on FOX News), Bill O'Reilly sat down with President Barack Obama for a live interview at the White House.

The conversation between the two was civil, and they spoke about the situation in Egypt, the recent legal setback to the health care bill, and Obama's thoughts on his presidency, two years in.

Perhaps the most interesting moment of the interview came at the very end, when O'Reilly fished for the ultimate compliment a President could give a cable news host who many view as having a partisan agenda.

This past Friday, Hugh Laurie was on 'The Tonight Show' (Weeknights, 11:35PM ET on NBC) in anticipation of the Super Bowl. As FOX was hosting the event, he had tickets to go, but admitted to knowing very little about football.

"I don't even understand the first thing about the game," he said. "This I know will annoy people who desperately want to go to the game, and I'm taking a ticket. Sorry."

Still, the star was excited, and despite not understanding the rules, he said he could recognize the athleticism of the sport.

As for where he was sitting, Laurie had no idea. He theorized, though, that placement could be very revealing. "I suppose we will find out just exactly where we rank in FOX's affections by where we're sitting," he said.

After what seems like years and years of classic rock superstars, 'Super Bowl XLV' (Sun., 6:30PM ET on FOX) marked a return to the mega-production halftime show. Fans of the Black Eyed Peas expected a big party, because that's what the Peas are known for, but even they were probably impressed and surprised by the spectacle laid upon them.

What looked at first like legions of fans flocked to the stage as the performance began, but it quickly became obvious that they were part of the show. Decked out in white uniforms complete with lights, these dancers made the performance extend beyond the stage and encompass the entire field.

Even the stage expanded to write out the word "LOVE" by the time the Peas got to their first break-out single "Where Is the Love?" from 2003. In fact, the entire show featured a compilation of their greatest hits, along with a few surprises.

Christina Aguilera may have gotten the opportunity to bungle the lyrics of 'The Star-Spangled Banner' at 'Super Bowl XLV' (Sun., 3:30PM ET on FOX), but FOX was able to book-end their coverage of the big game with 'Glee'-related material by featuring Lea Michele belting out 'America the Beautiful' at the top of the game along with their new episode afterward.

The 'Glee' starlet looked very warm in a thick and long coat. Considering it was an indoor stadium, we couldn't figure out why she felt the need to be so bundled up.

Maybe she was so nervous about the live performance that she forgot to take off her coat before walking out there. Maybe she forgot to put on the right dress under the coat. Can you imagine her taking off her coat in the dressing room to see her sleepwear underneath?

Alex Rodriguez scored tickets to 'Super Bowl XLV' (Sun., 6:30PM ET on FOX) because, well, he's A.Rod. He was apparently pretty into the game as well, as he couldn't even feed himself.

Either that, or it was just a cute moment incidentally captured by the FOX camera crews. In a brief segment spotlighting some of the big names who graced football's biggest games, including John Madden and former President and First Lady Bush, the camera cut to the baseball star and his girlfriend ... just as she was cramming a handful of popcorn into his mouth.

"I'm sure Alex is thrilled we just put the camera on him at that moment," announcer Joe Buck said, "Being fed popcorn."

On Sunday night, tens of millions of people will hunker down in front of their TVs to take in an entertaining pastime that has left people enraptured for decades.

And there's also going to be a game on.

Yes, we're talking about the ads during the Super Bowl, the only time during the year when a collective "Shhhh!" goes up when the commercials start. For over 30 years now, we've been programmed to expect big, ambitious ads during the game, and almost every year at least one or two get stuck in our brains.

But there are also hundreds of ads that have been forgotten, either because they went for broke and missed, tried to amp up the laughs to the opposite effect, or were just plain boring.

So, what are the keys to a good Super Bowl ad? What makes one suck? Follow us after the jump to find out.