Bruno Mars says his artificial smoke machine cost $15,000 (or $5,000, or $10,000, depending on the night). So he makes sure to use it every performance. The device has been cleared from Dolby Live, until Mars is back in August, to make room for a different show.

Lady Gaga , with her dazzling gowns and “LG”-branded bandstands, is moving in. Only four days separate these iconic residency productions. Mars closed his latest, explosive run at the theater Saturday.

Gaga restarts “Jazz + Piano” Wednesday. The two stars nearly align, which would be fine with Mars. Mr.

“24 Karat Magic” talked of possible collaborations during an interview in his Dolby Live dressing room prior to Saturday’s show. Gaga came to mind immediately, as her name come up early in the conversation for Mars’ appreciation of “Jazz + Piano.” He’s up for either a show or song with the superstar known as “LG” by her inner circle.

“Talking about Gaga — I’d love to do one with her,” Mars said. “I’ve got to at least sing with her, on her show.” Mars also mentioned he’d love to reunite with his Silk Sonic partner, Anderson .

Paak , when schedules permit. The music in Mars’ and Gaga’s Vegas shows are unalike, of course. Mars’ dance anthem “Uptown Funk” is a different vibe than Gaga’s cover of Dinah Washington’s “What a Difference a Day Makes.

” But the two artists, who have headlined Vegas for several years, share an affection for the city’s entertainment histo.