A carefree disco-influenced song like Dua Lipa’s “Dance the Night,” from Greta Gerwig’s blockbuster summer film “Barbie,” might seem effortless. But it was anything but, as you can see from Variety’s latest “Behind the Song” words-and-music video, where she and producer/co-writer Mark Ronson talk about the song’s creation and play individual vocal and instrumental tracks […]