Super Bowl XXXIV Jan. 30, 2000 At Atlanta_72,625 St. Louis 3 6 7 7 23 Tennessee 0 0 6 10 16 Atlanta wasn’t the most hospitable site for the big game — an ice storm crippled the city for much of Super Bowl week.

Is millions of dollars for 30 seconds of air time really worth it? Here's a timeline of how the Super Bowl became the most expensive night in advertising.

Here’s a look at some of the biggest upsets and spreads in Super Bowl history, from Joe Namath's guarantee to Tom Brady's first title.