The good-time anthems and bittersweet love songs on Emerson Drive’s Roll are the work of a seasoned country-pop group that blend craftsmanship with heart. The accent here is on the upbeat as singer Brad Mates leads the group in saluting a soulmate (“We Fit Together”), celebrating small-town values (“We Are This Town”), and giving a shout-out to their fans (“Show Us Whatcha Got”). “She’s My Kind of Crazy” and “This Is Our Time” are bursts of radio-friendly exuberance; “Love Hangover” and “Alone Today” let Mates display his persuasive way with a ballad.