Sequenced according to mood rather than chronology, Greatest Hits stretched back to Allan’s first hit, 1996’s “Her Man,” a catchy, untroubled love song that is indicative of the singer’s low-key approach. The collection proves Allan is a versatile artist, crossing into hard rock (“Man of Me,”), folk (“It Would Be You”) and even R&B (“Songs About Rain”), but the songs are always grounded by his voice.