Home Free performs ‘Ring of Fire’ on 'The Sing-Off'

Home Free, the country-style a cappella group that won season 4 of “The Sing-Off,” performs the Johnny Cash classic "Ring of Fire" on the show. The group will perform Feb. 23 at the NYCB Theatre at Westbury when the “Sing-Off Live Tour” comes to Long Island. (Credit: NBC)

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