Behind the scenes pop siren Shy Martin is responsible for penning such hits as Mike Perry’s ‘The Ocean’ and The Chainsmoker’s ‘All We Know,’ amongst several pop and dance co-signs that now includes Astrid S, Bebe Rexhe and Kygo. This month sees the Stockholm-based artist, known as Sara Hallstrom, step out from behind the writer’s table for a first in a series of solo singles