Songwriter/producer Sylvester Sivertsen’s breezy electro-pop aesthetic has quickly infiltrated the charts. Known simply as Sly, the Danish hitmaker began spreading his talents worldwide in 2018, injecting The Chainsmokers’ big-room EDM with some mellower grooves on “Side Effects.” Since then, he’s helped bring the funk to Shawn Mendes’ seductive soft rock with “Higher” and a little tropical heat to Dua Lipa’s slinky dance pop with “We’re Good.”