3 p.m. and 8 p.m., Verizon Arena. $25-$62.75.
I swear, one day, ethnomusicologists will have a field day looking back at Trans-Siberian Orchestra. It's a strange concoction: take equal parts arena rock and classical, fuse with Christmas carols and serve rock opera style. Then sprinkle with violins, 14 vocalists, two narrators, state-of-the-art pyro and lasers and you've about got it. As for studio work, aside from this year's “Night Castle,” a 26-song musical screed of good vs. evil and with a cover in dire need of Fabio's gracing, TSO's previous releases are All Things Christmas, except also for that one album conceived around Beethoven's final living hours. But the live show is where it's at. Much like the Globetrotters, they should be experienced at least once.