Ensemble cast? Check. Music you'll have to sing along to? Check. Eye-catching costumes? Check! Nine has it ALL, including actors-turned-singers and one singer-turned-actor who you might recognize. She may have been the last one cast in Nine, but when you see Fergie's show-stopping performance of "Be Italian," you'll question why she isn't in more flicks. She plays Saraghina, and while she's not the most g-l-a-m-o-r-o-u-s female lead in the film, she holds her own amidst big hitters like Penelope Cruz and Sophia Loren. Peep our interview to find out if she was intimidated by her cast mates!

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