Ring in the holiday season with three-time Grammy winners Pentatonix! The four-piece who found success through NBC's The Sing-Off, have been at the forefront of the recent a capella revival. With record-breaking albums behind them, the kings and queen of acapella jingle across the country on their 'Hallelujah! It's a Christmas Tour!'.

When a tribute band sell out the same arenas their subjects did, you know they're onto something and that is just the case with Killer Queen, a bunch of British superfans who've made celebrating their idols into an art form. Led by charismatic Freddie Mercury-look-and-soundalike Patrick Meyers, what started as a one-night thing has now spanned over 25 years and been welcomed the world over!