FANTASIA Barrino is the odds-on favorite to win “American Idol 3,” at least in the online betting world.

Betwwts.com, an online betting service, has Fantasia as 7-4 odds to win “AI3.”

Beginning tonight (8 p.m./Ch. 5), 12 finalists will begin battling for the “American Idol” crown, hoping to snare a recording contract, the release of a single and the success of past “AI” stars Kelly Clarkson, Ruben Studdard and Clay Aiken.

Here are the odds on all 12 “AI3” finalists, according to betwwts.com:

* Fantasia Barrino: 7-4

* La Toya London: 15-4

* Diana DeGarmo: 4-1

* Jennifer Hudson: 7-1

* Jasmine Trias: 8-1

* Jon Peter Lewis, Camile Velasco (tie): 10-1

* John Stevens: 11-1

* Amy Adams: 13-1

* George Huff: 15-1

* Matthew Rogers: 22-1

* Leah Labelle: 35-1