'The Simpsons' to 'House': FOX's 25 best and most important shows of the last 25 years

It started as a summer series with some good advance buzz but a format not seen on TV in a long time: Would people tune in to see aspiring singers compete for a record contract? By the time 20 million people watched Kelly Clarkson win the first season, the answer was in. "Idol" has been a giant hit ever since.