Christina Aguilera just drastically changed her hair color — and it's all for Nashville!

The (normally) blond bombshell traded in her fair-haired locks for a darker shade, opting to go a rich brunette -- almost black -- for her role as Jade in the country music drama series. In fact, the Voice judge officially unveiled her new 'do on Twitter Tuesday night (March 17).

"Jade's been busy studying her lines," the singer -- clad in a pink plaid shirt, black jeans and black booties -- captioned the photo. "Can't wait for #Nashville!" Of course, her raven-haired ringlets were hard to miss, especially as they gorgeously cascaded down her shoulders. We don't know about you, but it totally brought us back to the era of Xtina -- wig or not. Work it, girl!

Aguilera previously teased her brunette hair earlier this month, tweeting a photo of her back -- and a hint of dark hair -- on the Nashville set.

"Look at all that hair! Having lots of fun on the set of #Nashville," she wrote at the time. "More to come!" Check out the photo below.

Us Weekly reports that Christina Aguilera will play the role of pop star Jade St. John, who dreams of recording a country album. IRL, Aguilera teamed up with her fellow Voice coach Blake Shelton to record the country song "Just a Fool" for her 2012 album Lotus. Art imitating life?

Either way, we're loving Xtina as a brunette and can't wait for her upcoming appearance on Nashville!

 See Christina Aguilera Through the Years