Christina Aguilera is reportedly gearing up for the release of her fourth full-length, rumored to be titled Light & Darkness. And while few specifics are actually available, we now know (via MTV.com) that whenever the the followup to 2006’s Back to Basics hits record shelves, it will probably/most likely/hopefully feature the vocal talents of M.I.A., Santigold, and Ladytron. That’s because Aguilera apparently tapped these music heavy-hitters to help achieve the “eclectic vibe that she’s striving for on the album.” Whether the indie infusion worked will be determined come late 2009 (or early 2010) when Light & Darkness sees, well, light. Then again, this could all be conjecture.