JLS

The self-titled debut arrived in 2009, with Beat Again and Everybody in Love establishing the group’s early sound. The first has a more urgent rhythmic frame; the second gives the shared vocals a broader, more openly romantic setting. Aston Merrygold, Oritsé Williams, Marvin Humes and JB Gill each contribute to the texture, with the handovers and harmonies doing more than simply repeating a lead line.

The songs gain much of their momentum from that organisation. A shorter phrase can set up a stronger response, while a change in register lifts the arrangement without requiring another layer of instruments. The production is polished, but the central appeal remains recognisably vocal.

Outta This World followed in 2010, opening the catalogue towards a larger electronic dance-pop setting. Jukebox in 2011 continued to explore the relationship between a vocal group and increasingly varied production, with She Makes Me Wanna and Take a Chance on Me offering different entry points. The important contrast is between movement and stillness: an energetic single makes the rhythmic confidence obvious, while a ballad exposes how the voices fit together. The later return to recording and performance gave the early catalogue another context, and the anniversary edition of the debut put those first songs back in focus. JLS represent a moment when the traditions of the pop vocal group met the scale and texture of a new club-oriented chart sound, without losing the pleasure of a recognisable harmony.