Behind the Scenes at Super Bowl XLV

INSIDE EDITION reports from behind the scenes in Dallas at Super Bowl XLV.

It was a Super Bowl dream come true for Green Bay Packers fans. Their team defeated the Pittsburgh Steelers 31 to 25.

But hundreds of would-be attendees holding pricy tickets never got inside the stadium.

"This is a lifetime experience, like they say in the commercials, it's priceless, so there's no dollar value that can really compensate," an angry fan told INSIDE EDITION.

The "Super" snafu came after the fire marshal deemed a section of temporary seats to be unsafe, locking out 400 ticketholders. The NFL tells INSIDE EDITION, "The safety of fans attending the Super Bowl was paramount in making the decision."

Inside Cowboys Stadium, singer Christina Aguilera looked cool and collected before taking the stage to sing the National Anthem.

But Aguilera botched the lyrics, repeating one line twice.

Now she says she made the mistake because she was overwhelmed by her Super Bowl moment. "I can only hope that everyone could feel my love for this country and that the true spirit of its anthem still came through," she said.

INSIDE EDITION was with the Black Eyed Peas in the final moments before they performed the halftime show. was tweeting up until the last second, and Fergie said she was "nervous."

Fergie's husband, actor Josh Duhamel, was there cheering her on.

"I'm excited for my wife, I think they're going to have an amazing show," he told INSIDE EDITION.

There was a little problem with Fergie's microphone, but the glitch didn't detract from the performance.

Slash and Usher made surprise appearances during the show, thrilling the crowd.

Afterwards, INSIDE EDITION's Megan Alexander caught up with as he left the field. "I feel like I'm on top of the world!" he told her.

The stadium seats were filled with stars. TV cameras caught a candid shot of Cameron Diaz feeding popcorn to her boyfriend, Yankees slugger Alex Rodriguez.

Ashton Kutcher, Catherine Zeta-Jones and Michael Douglas, Jennifer Aniston, Hugh Jackman, Harrison Ford and Calista Flockhart, and John Travolta were in attendance. Former President George W. Bush and wife Laura Bush were also at the big game.

Owen Wilson actually watched the players practice from on the field.

"You can feel the sweat from here!" Megan Alexander said.

"I'm stretching; I think I might get put in the game. I've got to warm up my arm," he joked.

But in the end it's about the game, and the great victory of the Green Bay Packers, who celebrated with the people who matter most to them – their families.