Pentatonix Christmas In The City Tour brings the three-time Grammy-winning acapella group to Bridgestone Arena in Nashville to kick off the holiday season. Known for their powerhouse harmonies and the recent acapella revival, the group got its start on NBC's The Sing-Off and has since racked up record-breaking albums. Expect voices doing all the work, with no instruments needed, in a big arena setting that is perfect for a festive night out.