Lee Greenwood knows how to pull heartstrings. The singer-songwriter behind “God Bless the U.S.A.” hails from southern California and was discovered in Reno after a stint as a blackjack dealer. Greenwood released a few pop albums with his band, the Lee Greenwood Affair, and spent nearly 10 years working by day and singing by night in Nevada. By 1981, he signed with MCA and landed squarely in the top 20 of the Billboard U.S. country charts. With seven No. 1 songs, Greenwood has become somewhat synonymous with U.S. patriotism, George W. Bush appointed him to the National Council on the Arts for a six-year term. Hearing Greenwood belt out Christmas standards, on the longest night of the year, no less, is essentially July 4’s answer to Mannheim Steamroller — and an awesome way to end 2017.