And your next American Idol is … “American Idol.”

Fox’s blockbuster hit once again takes the top prize as the most expensive show on television.

Advertisers will pay a whopping $700,000 per 30-second spot for the Tuesday night edition of the singing contest bonanza when it starts up again in January, according to a survey of media buyers conducted by Advertising Age.

This is the third year in row that “Idol” – the highest rated show of the past season – tops the charts as the priciest show in TV-land.

The show’s big sponsors have been Coke, Ford and Cingular.

The Wednesday-night edition remains the second-most expensive, with prices ranging between $550,000 and $700,000.

“The audience numbers support the price,” said Pattie Garrahy, chief executive of media buyer PGR Media. Garrahy noted “the age and quality of viewer,” who are in the 25 to 49-year-old demographic coveted by advertisers.

The show is “so hyped and Fox builds up an appetite by putting it on in midseason,” said Brad Adgate, director of research for Horizon Media.

Other shows commanding top dollar are Fox drama “House.” Its prices are through the roof, double last year’s $200,000 for a 30-second spot.

Also fetching big ad bucks are ABC’s “Desperate Housewives,” and “Brothers and Sisters,” making its debut this season on ABC.

But there are also bargains to be had on the TV dial. News Corp.’s brand new network, My Network TV, has priced its telenovelas at the bottom of the barrel. “Desire: Table for Two” and “Fashion House” are priced at anywhere between $20,000 and $35,000 a spot, Advertising Age said.