Human Nature’s Phil Burton performs with Bella Strings during the Human Nature “Christmas, Motown and More” in the Sands Showroom at The Venetian, Sunday, Dec. 14, 2014. (Bill Hughes/Las Vegas …

Human Nature’s Phil Burton performs with Bella Strings during the Human Nature “Christmas, Motown and More” in the Sands Showroom at The Venetian, Sunday, Dec. 14, 2014. (Bill Hughes/Las Vegas Review-Journal)