Lindsey Stirling and Lexi Walker Perform 'Prayer of the Children,' Raise Awareness for Child Slavery

Singer Lexi Walker, violinist Lindsey Stirling and pianist Kendra Lowe came together to raise awareness about child sex trafficking in a touching video posted to Walker's YouTube channel Tuesday.

The trio performed an arrangement of the original song "Prayer of the Children" during a gala hosted by Operation Underground Railroad on Saturday.

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