There are artists who enter music because they need to express themselves or simply enjoy performing. And then there are artists who make music because it's part of their being, an inner force that manifests itself in a sense of purpose, a mission, a need to communicate thoughts and ideas and to impart a positive energy upon their listeners. Jen Foster hails enthusiastically from the latter school. On her melodically rich and exuberantly rocking debut effort, "Everybody's Girl," the award-winning singer, songwriter and guitarist displays a spirit that's both timeless and up-to-date. She belts and purrs, attacks and wails these dozen songs with the k ind of conviction found in the classic rock music she was exposed to even before she considered making music her personal path. That said, however, Foster notes that "I always felt this was my calling. This was just something I knew from the time I first started that it was what I wanted to do wit...