“This” is a mix of Art Deco and Hollywood Regency, with a bit of the 1960s thrown in: chrome-and-glass bar cart; two-tiered glass coffee table; area rug patterned in circles; acrylic chairs; faux-fur and jungle-print pillows. The palette, mostly earth tones, is relieved by a low, tufted rose-colored bench behind the sofa. A Kawai baby grand piano anchors the space, which, just to be clear, would be nothing to Ms. Chenoweth without her assertive companion, a mixed breed named Thunder.

Kristin Chenoweth, 51

Occupation: Actor and singer

I feel a song coming on: “My building is very well soundproofed, but I’m very conscious that after 10 I should probably not play the piano and sing. I say to myself, ‘Don’t go singing Bernstein at midnight.’”

All the world’s a stage, and Ms. Chenoweth wants to buy the set. “In a store, I’ll see the whole bedroom — with the carpet and the lamp and the nightstand and the bed and the bedding and the picture on the wall — and I’ll say, ‘I’ll take it, the whole thing,’” she said.

Still, it’s very easy to distinguish the apartment from a showroom. There is, first off, the bow and arrow on the wall. (“I’m from Oklahoma; I have shot a bow and arrow. But not at anyone,” said Ms. Chenoweth, whose heritage is part Native American.) There’s the string of Christmas lights in the master bathroom. (“I just like the feeling of Christmas all year.”)