Storm Large loves Christmas.

Maybe that’s surprising given the singer’s tendency to lean into raunchy humor in her songs and performances. She’s not religious, she clarified during a recent chat with GO! Magazine — rather, she focuses on “celebrating family, joy and exuberance and silliness and presents and brotherhood and all that stuff.”

Her bandmates in Le Bonheur, the group she’s led since releasing her 2014 album of the same name, are another story.

“I literally start talking about it in the summer, like, ‘Oh, you guys, I heard this song, and I don’t know why it isn’t a Christmas song; it should totally be a Christmas song,’” Large said from Chicago, where she performed a two-weekend residency with the Chicago Symphony Orchestra. “And they’re like, ‘Dude, you’re in a tank top, we’re sweating. Don’t talk about Christmas right now.’ I’m like, ‘No, you don’t understand. Listen! Listen!’ They get super annoyed.”

Large will celebrate the holidays her way with a two-night stand at the Tower Theatre on Friday and Saturday. The evenings will be set up variety-show style, and are just as apt to feature Large singing classic fare such as “Have Yourself a Merry Little Christmas” as they are to showcase her takes on Leonard Cohen’s “Hallelujah” or Journey’s “Don’t Stop Believing.” The dates fall after Christmas, of course, so Large may change the set list accordingly.

“It’ll be after Christmas, before New Year’s,” Large said. “We’ll do a little bit of holiday stuff — not so Christmas-y specific, but definitely super celebrating the season and time off and overeating and drinking, et cetera, et cetera.”

The show is part of her Holiday Ordeal tour, which also played two nights at the Tower last year. She’s hit the road with the variety show for the last 12 or 13 years, although she said she has done a Christmas show “as long as I’ve been a musician.”

Born in Massachusetts and a Portlander since 2002, Large is probably still best known nationally as a contestant on the reality TV show “Rock Star: Supernova” in 2006. She was eliminated on the final episode before the season finale, but worked with judge Dave Navarro on the 2007 single “Ladylike,” which appeared on her solo EP “Ladylike Side One.”

In Oregon, Large has a few claims to fame, including as the second lead singer (with China Forbes) of Portland’s “little orchestra” Pink Martini. Before joining that band in 2011, Large led a number of groups in Portland including The Balls, which featured pianist James Beaton, also musical director for Le Bonheur and Large’s main collaborator for the last 18 years.

Large calls Le Bonheur a “big, happy, bickering family,” and she wouldn’t have it any other way.

“People are like, ‘Oh, how did you know when you wanted to be a musician?’” Large said. “Well, once I figured out I could sing and that I could — I didn’t think I’d ever make a living doing it. I just thought, I will never be alone. I’ll have something to do, I’ll have someone to sleep with, usually there’s beer and snacks, and then there are people in front of me clapping and saying, ‘I love you.’ It’s like, wow. I don’t care if I never make a dime. This is what I want to do. I became a musician purely and unashamedly out of loneliness.”

Her autobiographical one-woman show “Crazy Enough” and 2012 memoir of the same name go into this loneliness in detail, from her mother’s frequent stays at mental institutions to her struggles with drug abuse. The show, which originally ran for 21 weeks in 2009 at Portland Center Stage at The Armory, returns to that venue for a 10-year anniversary run Jan. 25 through 30.

Large said the show’s original run “almost killed me.”

“It was like a three-hour marathon, 2½ hours of just me singing, yelling … having an abortion, September 11 — just brutal, brutal, brutal, brutal,” Large said.

This time, she will streamline the show (as well as perform a shorter engagement).

“I’ve never really written a show like that before, and so I found it — I watched the video of it and I found it to be very verbose,” Large said. “And I talk a lot anyway, but there’s a lot cleaner way — clearer and easier, simpler way — to get to the point of a story. So that’s my intent, is to streamline it — not necessarily edit or change it, but just streamline it and take just some syllables out, unnecessary calories out of it.”

She initially needed to be convinced of the show’s worthiness by Center Stage director Chris Coleman and Beaton (“James Beaton, my piano player and business partner, he basically called me chicken,” Large said). The book also took some prodding from a writer friend in Portland, Larry Colton, who read the play and insisted on a meeting with a literary agent.

“I got tricked,” Large said. “I didn’t know it was gonna actually become a thing, and then all of a sudden I’m in front of Random House, Penguin, Simon & Schuster, these big, glossy offices with big, glossy people and big, glossy dollar amounts in front of my face. And they’re just like, ‘So, we’re really interested in publishing your book,’ and I’m sitting there about to throw up.”