Scenes From the Walkup to Super Bowl 51

With the countdown underway to Sunday's kickoff of Super Bowl 51, here's a look at what's going on in Houston in advance of the big game between the Atlanta Falcons and New England Patriots.

Scenes From the Walkup to Super Bowl 51

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Fans watch a 3D light show as it is projected on a water spray at Super Bowl Live in downtown Houston.

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Lady Gaga answers questions about the Super Bowl 51 halftime show.

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A fan views Super Bowl Championship rings at the NFL Experience.

Charlie Riedel/AP

A fan holds a sign during opening night for Super Bowl 51.

Gregory Payan/AP

Fake Tom Brady is seen at Super Bowl Opening Night.

David J. Phillip/AP

NFL Senior Counsel of Legal Affairs Michael Buchwald holds up Super Bowl 51 tickets as he explains the anti-counterfeit features of legitimate tickets.

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Tom Brady works out during a practice session ahead of Super Bowl 51.

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Alex Mack snaps the ball to Matt Ryan during a Super Bowl 51 practice session.

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A fan ice skates at Discovery Green during Super Bowl LIVE in Houston.

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A general view of NRG Stadium, site of Super Bowl 51.

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Julio Jones of the Atlanta Falcons stretches out before practice.

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Atlanta head coach Dan Quinn greets Julio Jones during a Super Bowl 51 practice.

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The Texas-shaped swimming pool at the Marriott Marquis.

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A general view of the inside of NRG Stadium.

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Simone Biles takes a selfie with New England Patriots defensive lineman Jabaal Sheard and running back Tyler Gaffney during Super Bowl LI Opening Night at Minute Maid Park on Jan. 30, 2017 in Houston, Texas.

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Guillermo Rodriguez of 'Jimmy Kimmel Live!' interviews New England Patriots players during Super Bowl LI Opening Night at Minute Maid Park on Jan. 30, 2017 in Houston, Texas.

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Luke Bryan answers questions at a news conference for Super Bowl 51.

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New England Patriots quarterback Jimmy Garoppolo answers questions from the media during a press conference.

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Dwight Freeney of the Atlanta Falcons reacts to a question.

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Patriots head coach Bill Belichick and defensive coordinator Matt Patricia talk during a practice session.

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Tom Brady works out during a practice session ahead of Super Bowl 51.

Charlie Riedel/AP

New England Patriots quarterback Tom Brady walks to the bus after arriving at George Bush Intercontinental Airport.

David J. Phillip/AP

Matt Ryan, quarterback of the Atlanta Falcons, arriving for the big game.

Charlie Riedel/AP

Jabaal Sheard of the New England Patriots goes to the bus after arriving at George Bush Intercontinental Airport.