The Australian singer, now 34, has undergone a number of hair changes from blonde, red, grey and now a dark brunette.
Amorosi has shared photos of herself sporting her new dark locks on Instagram.
"You look like a different person," one fan wrote.
Another said, "You look stunning".
Back in February the singer shared a collage of her multiple hair colours and styles.
"The last 12 months of hair coloring 😂 .#blonde #redhead #ginger #gray and guess whatttttttt I got one last color to go," she wrote."
Amorosi, who now resides is Los Angeles, is reportedly making a comeback with a gospel album she recorded in 2016.
The unnamed album has a release date of late 2017/early 2018.