Down the stretch they come in "American Idol" (search). 

The four remaining finalists — all women, for the first time — put on their best dancing clothes for disco night.

From here on, it's all in the numbers:

— Sixteen days before the next "Idol" winner is crowned in a final results show that airs May 26

— Eight more nights of "Idol" shows (including two specials)

— Twenty more songs to sing in all

— Eighteen costume changes

— Eight more times to hear the "Idol" host sign off with his dubious trademark phrase: "Seacrest out."

If there is any justice — and "Idol" judge Simon Cowell (search) is correct — the last two singers standing will be Fantasia Barrino (search) and La Toya London (search).

Cowell has said publicly that those two are in a class by themselves in this competition — though he has predicted that the fans will pick LaToya and teen-aged belter Diana DeGarmo (search).

No wonder. Nothing seems to turn out as expected on "Idol." In the music industry, "it's always more about looks than talent," says Q104.3 radio personality Zach Martin, who's betting that cutie Jasmine Trias (search), 17, will beat her three vastly more talented co-contestants.

"Britney Spears does not have the greatest voice in the world," says Martin, but has become one of the world's best known performers.

"There's been a whole history of overweight women who sing really well who go nowhere even though they're really talented," her says.

Tell Jennifer Hudson (search) about it.