The 2012 Super Bowl, XLVI, is just three days away as fans gear up for a rematch between Tom Brady's New England Patriots and Eli Manning's New York Giants.

The game, which takes place at Lucas Oil Stadium in Indianapolis and will start at 6:29 p.m. EST Sunday on NBC, is of historical significance because it's the sixth time a Super Bowl rematch will occur. More than 162 million viewers in the nation watched last year's Super Bowl, the most-watched television program in U.S. history.

However, it's a strong possibility that the ratings for this Super Bowl could surpass those of last year's. After all, this Super Bowl will feature a rematch embodying the longstanding Boston-New York rivalry and will pit New England's great offense against New York's tough defense.

What fans will also be gearing up for are musical performances and celebrity appearances that may outdo any previous Super Bowls.

American Idol winner Kelly Clarkson will be singing the national anthem, which is not the first time she has done it at major events. She also sang the anthem before game five of the 2011 NBA Finals between the Miami Heat and Dallas Mavericks and before game three of the 2010 World Series between the San Francisco Giants and Texas Rangers.

What's more is that E! Online reported aspects about her rendition to have odds just like the Super Bowl itself, including the probability she will wear a certain team jersey or, even more entertaining, the probability she will botch her lyrics as Christina Aguilera did during last year's Super Bowl.

Clarkson joins a list of acclaimed singers who have performed the national anthem at the Super Bowl, including Carrie Underwood, Whitney Houston, Billy Joel, Diana Ross, Neil Diamond, Beyonce and Mariah Carey.

Other singers to headline the Super Bowl will be country couple Blake Shelton and Miranda Lambert, who will sing America the Beautiful before the game; Madonna, who will perform her newest single Give Me All Your Luvin', featuring Nicki Minaj and M.I.A., during the halftime show; and Lenny Kravitz and The Fray, who will each have one song of theirs braodcast live at a private, NFL-sponsored pre-game concert at the Indiana Convention Center, according to the Indianapolis Star.

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