Nathan Walker cheers outside Cowboys Stadium before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Green Bay Packers fans Mark Madson, left, and Dieter Sturm drive their Packer Mobile outside Cowboys Stadium before the NFL football Super Bowl XLV against the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. The two Packers fans took the car on a road trip from Wisconsin's Lambeau Field to support the Packers. (AP Photo/LM Otero)

Michael Seth sells cheeseheads outside Cowboys Stadium before the NFL football Super Bowl XLV game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Riedel)

Will.i.am of the Black Eyed Peas takes a look at the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Feb 6, 2011; Arlington, TX, USA; A fan of the Green Bay Packers cheers before Super Bowl XLV against the Pittsburgh Steelers at Cowboys Stadium. Mandatory Credit: Jason O. Watson-US PRESSWIRE

Feb 6, 2011; Arlington, TX, USA; A vendor holds up programs before Super Bowl XLV between the Green Bay Packers and the Pittsburgh Steelers at Cowboys Stadium. Mandatory Credit: Matthew Emmons-US PRESSWIRE

Feb 6, 2011; Arlington, TX, USA; A general view of the stadium exterior before Super Bowl XLV between the Green Bay Packers and the Pittsburgh Steelers at Cowboys Stadium. Mandatory Credit: Matthew Emmons-US PRESSWIRE

Actress Jennifer Aniston on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Cowboys Stadium sits ready for the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Feb 6, 2011; Arlington, TX, USA; Members of the Pittsburgh Steelers arrive on a team bus before Super Bowl XLV against the Green Bay Packers at Cowboys Stadium. Mandatory Credit: Jason O. Watson-US PRESSWIRE

Kevin Fitzpatrick plays with a lasso outside Cowboy Stadium before the NFL football Super Bowl XLV game Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Actor Owen Wilson throws a football before the NFL football Super Bowl XLV game between the Pittsburgh Steelers and the Green Bay Packers, Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Green Bay Packers linebacker Clay Matthews arrives at Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

A Green Bay Packers player stretches before the NFL Super Bowl XLV football game against the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Matt Slocum)

Actress Jennifer Aniston is seen before the NFL football Super Bowl XLV game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Krupa)

Pittsburgh Steelers' Brett Keisel takes a photo on the field before the NFL football Super Bowl XLV game against the Green Bay Packers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Pittsburgh Steelers mascot Steely McBeam on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Actor Owen Wilson plays catch on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Green Bay Packers' B.J. Raji stretches on the field before the NFL football Super Bowl XLV game against the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Pittsburgh Steelers wide receiver Hines Ward (86) warms up on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Actor Hugh Jackman on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Feb 6, 2011; Arlington, TX, USA; Pittsburgh Steelers chairman Dan Rooney (right) stands with founding owner Art Rooney before Super Bowl XLV against the Green Bay Packers at Cowboys Stadium. Mandatory Credit: Matthew Emmons-US PRESSWIRE

Actor Hugh Jackman, left, and former boxing champion Sugar Ray Leonard pose for photos at Cowboys Stadium before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers on Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Actor Owen Wilson plays catch on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Perry Knotts/NFL)

Feb 6, 2011; Arlington, TX, USA; A member of Blue Man Group performs before Super Bowl XLV between the Green Bay Packers and the Pittsburgh Steelers at Cowboys Stadium. Mandatory Credit: Kirby Lee-US PRESSWIRE

Green Bay Packers' Aaron Rodgers kisses a football before the NFL football Super Bowl XLV game against the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Matt Slocum)

Green Bay Packers' B.J. Raji stretches before the NFL Super Bowl XLV football game against the Pittsburgh Steelers on Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Matt Slocum)

A fan watches the events in Cowboys Stadium before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Mike Groll)

Green Bay Packers fan Lacy Winchell high-fives other fans Sunday, Feb. 6, 2011, near Lambeau Field in Green Bay, Wis., before NFL football's Super Bowl XLV later Sunday in Arlington, Texas, between the Packers and the Pittsburgh Steelers. (AP Photo/Mike Roemer)

A marching band member performs outside Cowboys Stadium before the NFL football Super Bowl XLV game between the Green Bay Packers and Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/LM Otero)

Pittsburgh Steelers' Isaac Redman (33) and Rashard Mendenhall (34) walk on the field before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/David J. Phillip)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) runs onto the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Pittsburgh Steelers running back Isaac Redman (33) warms up prior to Super Bowl XLV against the Green Bay Packers on February 6, 2011 in Arlington, TX. (Gary Vasquez/NFL)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) and Pittsburgh Steelers safety Will Allen (26) hug prior to Super Bowl XLV against the Green Bay Packers on February 6, 2011 in Arlington, TX. (Gary Vasquez/NFL)

Pittsburgh Steelers running back Rashard Mendenhall (34) warms up prior to Super Bowl XLV against the Green Bay Packers on February 6, 2011 in Arlington, TX. (Gary A. Vasquez/NFL)

Green Bay Packers linebacker Clay Matthews (52) warms up prior to Super Bowl XLV against the Pittsburgh Steelers on February 6, 2011 in Arlington, TX. (Gary A. Vasquez/NFL)

Green Bay Packers linebacker Clay Matthews (52) warms up prior to Super Bowl XLV against the Pittsburgh Steelers on February 6, 2011 in Arlington, TX. (Gary A. Vasquez/NFL)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Feb 6, 2011; Arlington, TX, USA; Green Bay Packers players huddle before Super Bowl XLV against the Pittsburgh Steelers at Cowboys Stadium. Mandatory Credit: Kyle Terada-US PRESSWIRE

NFL Commissioner Roger Goodell poses with officials prior to Super Bowl XLV between the Pittsburgh Steelers and Green Bay Packers on February 6, 2011 in Arlington, TX. (Kevin Terrell/NFL)

Singer Christina Aguilera stands on the field before the start of the NFL Super Bowl XLV football game between the Green Bay Packers and Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Lynne Sladky)

Former President George W. Bush, center, and his wife Laura Bush speak with John Madden, left, before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers, Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Mike Groll)

Pop star Christina Aguilera sings the national anthem before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Mike Groll)

Green Bay Packers' Aaron Rodgers talks with head coach Mike McCarthy before the NFL Super Bowl XLV football game against the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Paul Sancya)

The TCU band performs before the NFL Super Bowl XLV football game with Pittsburgh Steelers and the Green Bay Packers, Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Marcio Jose Sanchez)

Green Bay Packers quarterback Aaron Rodgers (12) on the field of Cowboys Stadium prior to the start of Super Bowl XLV in Arlington, Texas on February 6, 2011. (Kevin Terrell/NFL)

Daniel Fiuza, left, and Brett Klien, right, both of Toronto, pose for photographs before the NFL football Super Bowl XLV game between the Pittsburgh Steelers and the Green Bay Packers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/LM Otero)

Actress Lea Michelle, from the television show "Glee," sings "America the Beautiful" before the NFL football Super Bowl XLV game between the Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Krupa)

Christina Aguilera sings the national anthem before the NFL football Super Bowl XLV game between withe Green Bay Packers and the Pittsburgh Steelers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Krupa)

Pittsburgh Steelers' Ben Roethlisberger listens to the national anthem before the NFL Super Bowl XLV football game against the Green Bay Packers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Kathy Willens)

Former President George W. Bush, center, and his wife Laura Bush stand with John Madden, left, during the national anthem before the NFL Super Bowl XLV football game between the Green Bay Packers and the Pittsburgh Steelers, Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Mike Groll)

Singer Christina Aguilera sings the national anthem before the start Super Bowl XLV at Cowboys Stadium in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Singer Christina Aguilera sings the national anthem before the start Super Bowl XLV at Cowboys Stadium in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Pittsburgh Steelers wide receiver Emmanuel Sanders (88) runs on to the field before the start Super Bowl XLV at Cowboys Stadium in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Pittsburgh Steelers head coach Mike Tomlin, right, and quarterback Ben Roethlisberger listen to the national anthem before the start Super Bowl XLV at Cowboys Stadium in Arlington, Texas on February 6, 2011. (Gary A. Vasquez/NFL)

Lea Michele of the hit show "Glee" sings "God Bless America" before the start of the NFL Super Bowl XLV football game between the Pittsburgh Steelers and the Green Bay Packers Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Riedel)