Never likely to be one of those singers who is content just to turn up, lay down a main vocal part and leave, Ellie Goulding's approach to writing and recording is, she admits, borderline obsessive -- but then, anything less, she says, would be a waste of time. As her debut album, "Lights," made so thrillingly clear, Ellie Goulding uses her voice as a texture in much the same way that a skilled instrumentalist would. It is a sound -- in Ellie's case, an utterly distinctive and unforgettable one -- that can play as important a role in her songs as any other musical detail.

The new record "Halcyon" describes a journey out of heartache and towards hope. It is almost as if you can hear Ellie's psyche shrinking and then renewing, rebooting itself after two-and-a-half tumultuous years in her life: a Brit award, the release of "Lights," love, loss, writer's block, a new relationship, singing at the White House and at a certain spring wedding, a number one pop record that has done over 3 million in America, confronting her doubts and fears, digging deep and locating her artistry again, returning to the countryside she grew up in and, in a converted barn, making a record that confirms her as one of the United Kingdom's most singular and compelling songwriters. Two such fans are a young couple who, 17 months ago, were married in London and, for one of the few private moments the world allowed them on the day, approached Ellie and asked her to sing at the party they were holding following the wedding reception. It isn't every day, of course, that a musician will stand on a stage as a pair of giant doors open, and watch pretty much the entire Royal Family advance into the room, the Duke and Duchess of Cambridge at their head, ready to be entertained.

But that is exactly what happened to Ellie and her band at Buckingham Palace in April 2011 when, after months of secret negotiations during which Ellie was sworn to -- and maintained -- her silence, she sang a selection of her own songs and cover versions (including tracks by Michael Jackson, Tina Turner and, inevitably, Elton John's "Your Song") for the newlywed royals, and afterwards mingled with their guests.

Ellie's success in America -- her single, "Lights," spent over a year on the Billboard Hot 100 chart -- has been another experience she finds it hard to describe. America has clearly got under her skin. "They embrace everything," Ellie says. "They'll take your biggest fault and turn it into something positive. And the work ethic in music over there isn't like anything I've ever known. You get back to your hotel at one in the morning and someone will contact you and go, 'Do you want to come over to the studio?' So over you go, and there's Swedish House Mafia and Skrillex there, and will.I.am in the next-door studio. Everyone's just hanging out, making music."

Capturing a period of profound change and transition in Ellie's life, "Halcyon" is, despite the mournful nature of much of its inspiration, ultimately a redemptive album. Above all, it communicates the sense of a young musician poised on the cusp of new adventures, the war won (although, this being Ellie, it may turn out to be only a temporary truce), and lessons learnt. When she says, "Loneliness has been the biggest influence on this record; I feel like what I do is l onely," you want to give her a reassuring hug. But then Ellie will follow this with: "I still feel like there's this force, pushing me to do this." And you are reminded of precisely what it is that makes her so special: honest and self-aware enough to endure and acknowledge her propensity for what she herself calls "over-thinking"; brave enough to confront this and go into battle again; and possessed of a talent, and a voice, of such extraordinary power that, for all her vulnerability, you sense that, deep down, Ellie Goulding knows she is impregnable.

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