Where's Cher been?

The singer and actress, once so prolific, virtually disappeared from the big screen after 1999's "Tea with Mussolini."

Well, she's back. Variety reports Cher will co-star alongside Christina Aguilera's first lead role in "Burlesque."

Aguilera has signed on to play a small-town girl who lands a singing gig at a Los Angeles club owned by Cher. No points for guessing the star's vocal acrobatics will help save the financially struggling venue.

Also notable: Cher will actually sing on-screen, something Variety claims she's never done for a live-action movie role. Could we even see a duet between the pop stars?

Filming begins in November.