Fergie is the latest addition to the cast of Nine, a big screen adaptation of the musical.
She'll play the part of Saraghina, and will lend her vocal skills for the part as well.
Fergie says, "She's basically a prostitute on the beach. She introduces him to the world of sexuality. It's a very strong song. I'm just thrilled I get to play a character."
In other Fergie news, she says she's back in the studio recording another album. That girl is busy! How's she gonna have time to plan a wedding?