SATURDAY

Trans-Siberian Orchestra

Despite the death of tour founder and mastermind Paul O'Neill earlier this year, his legacy will live on through the lasers and pomp-rock of TSO. Al Pitrelli, the musical director for one of the two TSO units that tour the country, said fans won't see TSO fade away anytime soon.

3 and 8 p.m. Dec. 9. $48.50-$88.50. Infinite Energy Arena, 6400 Sugarloaf Parkway, Duluth. 1-888-929-7849, infiniteenergycenter.com

Robert Earl Keen

This is the sixth year the Americana favorite has presented his “Merry Christmas From the Fam-O-Lee” show, and this year will include a set of songs from country music mainstays as well as Keen favorites and holiday tunes.

8 p.m. Dec. 9. $35-$55. Variety Playhouse, 1099 Euclid Ave. NE, Atlanta. 1-877-987-6487, ticketfly.com

MONDAY

Christmas with the Celts

Singers/musicians Ric Blair and Eimear Arkins front a show that blends traditional Irish music with American pop stylings. They’ll be supported by other multi-instrumentalists and, of course, Irish dancers.

8 p.m. Dec. 11. $20-$35. City Winery, 650 North Avenue NE #201, Atlanta. 404-946-3791, citywinery.com

TUESDAY

Star 94.1 Presents Christmas with Kelly Clarkson and Bleachers

The powerhouse vocalist is finally doing things her way on her new “Meaning of Life” album, but she still has affection for those massive pop hits. And if you haven’t seen Bleachers live yet, this is a good opportunity to check out one of pop’s smartest bands.

7:30 p.m. Dec. 12. $44.50-$69.50. Coca-Cola Roxy, 800 Battery Ave. SE, Atlanta. 1-800-745-3000, ticketmaster.com

Katy Perry

For her first tour since the 2014-15 “Prismatic” run around the world, the chameleonic pop star is bringing another lavish production filled with eye-popping props (giant salt and pepper shakers!), bursts of color and a set list that draws from her current album, “Witness.” Don’t worry, the hits aren’t neglected, as fan favorites “Roar,” “I Kissed a Girl” and “Teenage Dream” will receive plenty of the spotlight.

With Purity Ring, 7 p.m. Dec. 12. $50.50-$200.50. Philips Arena, 1 Philips Drive, Atlanta. 1-800-745-3000, ticketmaster.com