25 pictures of the NCAA championship teams from the last quarter-century

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In 2005, the North Carolina Tar Heels defeated Illinois.

March Madness is underway - and with Middle Tennessee's huge upset over Michigan State in the first round and Northern Iowa's half-court shot to upset Texas at the buzzer, it's already proving to be a dramatic tournament.

It's impossible to know which teams will be squaring off in the NCAA championship game, slated for April 4.

In the meantime, we took a walk down memory lane and rounded up pictures of the past 25 championship teams.