The "Ain't No Other Man" songstress showed off the new hair colour on Instagram, reported Aceshowbiz.
The photo showed the 35-year-old's long hair arranged in wavy do and swept to one side.
Rocking a bright red lipstick, Xtina looks like fictional character Jessica Rabbit who was created by Gary K Wolf.
A lot of her fans have commented on her new look and most of them love it. "I love your hair!!!" one wrote, while another added, "so gorgeous.