Isaiah Firebrace is the $1.60 favourite to be crowned X Factor Australia winner ahead of the Grand Final on Sunday and Monday.
Season 8 of the hit Channel Seven show looks set for a tense finale with Isaiah and Amalia Foy expected to battle it out to be crowned the winner.
It looks set to be a dream debut on the show for judge Adam Lambert, who is a hot chance of claiming victory in his maiden appearance with the top two fancies in Isaiah and Amalia.
Isaiah is the $1.60 favourite ahead of Amalia, who is at $3.40 in Sportsbet's betting market. Davey Woder is $7.00 to win, while Vlado is the $11 outsider of the final four contestants.
Lambert is the clear $1.25 favourite to be the winning judge with the top two acts under his wing, while Guy Sebastian ($7.00) and Mel B ($11) are the same prices as their remaining hopes.
In the "Top Adam Lambert Contestant" market, Isaiah is $1.15 to finish higher than $5.00 shot Amalia.
Sportsbet are also offering betting on who will finish in fourth place with Vlado the $1.87 favourite to be the first voted out of the Grand Final.
Davey is $2.50 to go first, while Amalia ($7.50) and Isaiah ($11) look unlikely to be the first to exit on Sunday.