For five seasons, Lifetime's show Dance Moms has tracked the lives of preteen girls and aspiring dancers at the Pittsburgh-based Abby Lee Dance Company. The most famous alum? Sia's go-to dancer Maddie Ziegler, 12. Now, two more cast members are set on stardom, but not as dancers -- they want to be pop stars.

Nia Frazier, 13, aka Nia Sioux

Musical Start: "I've always sang in the mirror."

Influences: "My favorite singers are Beyoncé, Rihanna and Meghan Trainor."

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