Some singers learn how to use their voice. Scarlett Fagan had to learn how not to be afraid of hers. Long before sold-out rooms and records of her own, the London-born, Devon-raised singer was the shy kid absorbing Etta James, Amy Winehouse, Motown, soul and reggae, discovering in those records that the most powerful voices weren't necessarily the prettiest or safest—they were the ones willing to tell the truth.