Her father, a businessman and car dealer in her hometown of Bendigo orchestrated a publicity campaign with "Vote for Kate" stickers and buttons appearing all over central Victoria.
Williams was generally considered the favourite, but, on 21 November 2005, DeAraugo was crowned as the third Australian Idol winner with a vote that is still the closest in the show's history.
To promote the tour, the four released a cover of a Donna Summer hit classic, "This Time I Know It's for Real", under the name of Young Divas.
On 22 June 2007, it was announced that Ricki-Lee Coulter had decided to leave the group in order to focus on her solo career following rumours of infighting.
DeAraugo and the other two remaining group members stated that they would carry on with their plan to record a second album, which they hoped to release in November of the same year.
The group performed "When You Believe," which was originally sung by Mariah Carey and Whitney Houston for the 40th anniversary of Channel 7's Telethon Western Australia.
On 22 October, they appeared on Australian Idol season five for a third time when they performed their new single, "Turn Me Loose", along with New Zealand rapper Savage who is featured on the track.
On the season five finale of Australian Idol, when Natalie Gauci was declared the winner, the group performed their single "Turn Me Loose" for a second time with Savage.
On 28 March 2008, after three months of apparent inactivity, the Young Divas' record label, Sony BMG, announced in The Daily Telegraph that, due to the underperformance of "Turn Me Loose", no second single would be released from New Attitude.
[5] The move meant that DeAraugo and Emily Williams became the only remaining members of the Young Divas, though their manager David Champion stressed that the group's career was not over and a third line-up would appear after a hiatus.
"[6] In November 2011, in an interview regarding full-body liposuction, DeAraugo admitted that her second album had been completed yet was held back from release, blaming it on her body image.
[7] In February 2012, DeAraugo was featured on the Nine Network weight-loss reality show Excess Baggage, along with other well-known people such as Kevin Federline and Christine Anu.
She became the star of the company's "Get Real" national program, stating that her aim was to achieve and manage her own goal weight and help promote healthiness among Australia's younger generation.
[11] On 11 August, DeAraugo appeared on the radio show 2Day FM and announced that she had been forced to withdraw from her endorsement deal with Jenny Craig due to health problems.
[12] DeAraugo was arrested by Victorian Police officers twice in 2017 in regards to possession of crystal methamphetamine (more widely known as "ice") as well as a tomahawk and large knife.