For the third year in a row, American Idol is the most expensive show on television for advertisers.

Those that want to have their voice or product heard will have to pay between $500,000 and $700,000 for a 30-second spot on the sixth season, beginning in January. Moreover, if these companies wish to advertise during the American Idol finale, it'll cost them even more.

Because over 30 million viewers watched last year's final broadcast, the price of $1.3 million for 30 seconds is bound to go up as more people tune in to see who will follow in nthe footsteps of Taylor Hicks.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.