Prince, Elton John and soon Whitney Houston — Norwegian Cruise Line has made headliner tributes its signature at sea, and the line's head of entertainment, Bryan White, has lifted the lid on how those shows actually get made.

The short answer: slowly, and with a lot of data. White calls show selection a mix of "creative science and commercial art", with NCL studying demographic data, cruise durations and regional itineraries to figure out who's actually on board. Every concept — from a big-budget spectacle to an immersive burlesque residency or an acrobatic production — has to clear one bar: does it feel like something you'd see in London or New York?

From idea to opening night takes 18 to 24 months. There's concept development with internal review rounds, then a workshop phase to shape the story, followed by full production: auditions, casting, set design and build. About four months before the set goes on board, the cast decamps to NCL's rehearsal studio in Tampa, Florida, while technicians work on scenery, lighting, video and sound. Everything comes together in technical and dress rehearsals, with crew preview performances to stress-test the show before paying guests ever see it.

Shows aren't set-and-forget, either. NCL tracks post-cruise surveys, digital ratings and attendance week by week. Strong performers get their lifespan extended or adapted for other ships; anything that drags or fails to land gets edited or retired. Managers also sail along, watching audiences and chatting to passengers about what they want more of.

Practically speaking, headline productions run several times per voyage — typically two performances a night over multiple days — so everyone gets a shot at a seat. Beyond the main theatre there's live rock at Syd Norman's Bar, comedy sets and late-night cabaret.

The big test comes next year, when Norwegian Aura launches with a Whitney Houston tribute as its headliner, developed with The Estate of Whitney E. Houston and Primary Wave Music. It's a 45-minute concert-style show in a three-storey theatre with a live band — and notably, no single performer "playing" Whitney. White says it's a contemporary theatrical concert rather than an impersonation act, built around songs like "I Will Always Love You" and "I Wanna Dance with Somebody".

Why should a cruiser care? Because the evening entertainment is often the difference between a good sailing and a great one — and if you're choosing between ships in a fleet, knowing what's on the main stage (and that it's been iterated based on thousands of guest reviews) is a genuinely useful data point. The Elton John show on Norwegian Aqua has reportedly scored impressively in post-cruise surveys, which bodes well for the Houston production.

The piece was reported by The Independent Travel.