A great song, says Colbie Caillat, should lift your heart, warm the soul and make you feel good. Taking her own sound advice, "Coco", the debut album by the 22 year-old Californian singer-songwriter is simply crammed full of them. Colbie comes as a welcome breath of fresh air in an age where marketing has been elevated above content and so many songs are written and produced to a pre-ordained formula.