Christina Aguilera's officially gone from "Dirrty" to nerdy.

After venturing into raunchy R&B and jazzy torch songs, the pop star's next album is shaping up to include a blog-a-rific parade of indie faves, with edgy Sri Lankan MC M.I.A., electropunks Ladytron, and Brooklyn-based songwriter/singer Santigold just emerging as Aguilera's latest announced collaborators.

Calling in to her own online radio station on aperadio.com, Aguilera named those artists, but didn't reveal too many details about her album, which is expected to be released in late 2009 or early 2010. "I know I can't let too much out the bag too soon," she said [via MTV]. "I just can't, 'cause I really want you guys to be surprised and to experience firsthand what I'm talking about or what I'm not talking too much about."

As previously reported, Aguilera's been working closely with Australian solo artist Sia, who rose to fame via her lead vocals for Zero 7, and other rumored collaborators have included Le Tigre and Goldfrapp, although Aguilera's reps have yet to confirm their participation.

Christina Aguilera sure has come a long way from her "Genie in a Bottle" days. For her upcoming September album, Light & Darkness, she recorded songs with British electronic acts Goldfrapp and Ladytron, plus former Zero 7 singer Sia, as SPIN.com reported last summer.

Now, Perez Hilton says that über-feminist punk group Le Tigre will join "Xtina" in the studio to work on the album.

Known for their bold lyrics and outspoken support of gay/lesbian and women's rights, Le Tigre had been on a musical hiatus since 2007. Dogged by rumors of a split, singer Kathleen Hanna (formerly of the "riot grrrl" band Bikini Kill) took to the group's MySpace in April to proclaim that Le Tigre had not broken up. And now comes this news.

In fact, Sia might be the one responsible for getting Le Tigre on board with the project. She and bandmember JD Samsom have been romantically linked -- and as she told SPIN.com, she thinks Christina is "rad"!

[source.]

Download/Listen to one of her classics...
Christina Aguilera - So Emotional