Many viewers scratched their heads when a mysterious woman -- not Alicia Keys -- came on stage to sing the chorus of "Empire State of Mind" with Jay-Z on "Saturday Night Live."
We're pretty sure the woman is Bridget Kelly, who tours with Jay-Z and fills in for Keys. Kelly posted a photo on Twitter of the "Saturday Night Live" dress rehearsal.
According to her Facebook page, 23-year-old Kelly attended LaGuardia High School for Performing Arts in New York City. She's working on her debut album.
Learn more about Kelly by clicking on the links that accompany this page.