A former contestant on the television talent show X Factor has been killed in car crash, just hours after performing at a country music festival in South Australia.
Nathaniel O'Brien, who appeared on the Channel Seven reality program last year, died when his car crashed into a tree in the small town of Hanson, about 150 kilometres north of Adelaide, at 11am on Sunday.
The 19-year-old had performed on Sunday morning at the Burra Country Music Festival, and was driving on the Barrier Highway towards Adelaide, where he was due to perform another gig that day, when the crash occurred. 
South Australia Police said the teenager was the only person in the vehicle at the time, and died at the scene of the crash.
Tributes and messages of condolence were being posted on social media for the singer-songwriter, from Burra in South Australia. 
On the X Factor last year, O'Brien progressed through the bootcamp stage to become one of the top 24 contestants on the show.
He won a mentor session with a vocal coach and was mentored by X Factor judge Natalie Bassingthwaighte, who posted on Twitter on Sunday night that O'Brien had the "voice of an angel".
My heart goes out to Nathaniel O'briens family after hearing of his tragic passing. What a spectacular young man with the voice of an angel
??? Nat Bassingthwaighte (@nataliebassing)      November 8, 2015
O'Brien had been singing from a very young age, and his family were heavily involved in the country music scene.
In his last performance on Sunday morning, O'Brien was photographed singing and playing guitar on stage with his sister, Tracey Rains.
Their parents, Danny and Karen, had started Country Music South Australia and had organised the music festival where their son last performed, according to Radio Adelaide host Wally Sparrow, who presents Saturday's Country Brekky.
"It's just so sad, I can't believe it," Sparrow told the Adelaide Advertiser. "He had the whole world ahead of him.
"He had an amazing voice. He was an amazing talent and he won almost everything he went in."
One woman posted on social media that she had heard O'Brien perform at the music festival on the morning on his death.
"Your beautiful voice really stirred me with those gospel songs this morning," she wrote.
"So hard knowing we will never again see you perform. RIP gorgeous young man. Sincere condolences to your family and friends."
O'Brien was also a finalist in the Australian Country Music People's Choice awards, which are due to be announced in Tamworth in   January.
South Australia Police said in a statement that crash investigators were examining the circumstances surrounding the crash and a report would be prepared for the coroner.