Karise Eden used to work in a sex shop and inflict pain upon herself, but all that is in the past now, Sportingbet and ARIA records seem to show.

Eden just hit the second spot on this week's ARIA singles chart with her June 11 rendition of "Hallelujah" on The Voice Australia. She is well on her way to becoming the first champ of the hit singing show.

Bettors seem to agree, and they do not want anyone else to win, according to the Sportingbet CEO himself.

Sportingbet Australia CEO Michael Sullivan said Eden was the clear choice among those willing to wager on the results of The Voice Season 1.

"We have taken a string of big bets this week with one punter having $4500 on her plus two other bets of $2000 and plenty more between $1000 and $1500," Sullivan told Herald Sun.

"90 per cent of the money this week has been for Karise Eden with the rest just sprinkled between the other three contestants... Punters have anointed her the winner and simply don't want to be on anyone else to win," Mr Sullivan said further.

Eden has opened up about her troubled past, making a point to say that she has moved on. And she is picking up the pieces now.

"I won't go into the actual reasons why. I guess I was just stuck in a place in my life when I thought there was nothing else. I was nothing, I felt nothing," Eden told Herald Sun in an interview.

Eden also said she strayed from home at age 13, but the self-inflicted wounds had started at age 11. She had lived in up to 20 refugee centres since stowing away, but stopped harming herself at age 15 or 16.

Eden is now living with her best friend's mother. Her friends urged her to join the singing competition, and she sounded happy about having tried.

"Now I have found the job I really want," she said.

Sarah De Bono is also a strong favorite in The Voice, with Australian Idol judge Ian Dickson saying De Bono is a pop star material.

Rachael Leahcar has also endeared many Aussie hearts since performing La Vie en Rose during the show's blind auditions.

Cheers for the fourth finalist, Darren Percival, pale in comparison to what the girls receive on various social networks. However, Mr Dickson said he also liked him.

"He is such a good-natured man and I think it's time that we had a new crooner."

The fate of Karise Eden and the rest of the four finalists will be revealed on Monday night on the Season 1 finale of The Voice Australia.

Also read:

The Voice Australia Recap: Karise Eden Receives Loud Virtual Cheers

The Voice Australia: A Full Chapter for Delta Goodrem