"The best songs come from broken hearts."Bird Barrett has grown up on the road, singing backup in her family's bluegrass band and playing everywhere from Nashville, Tennessee, to Nowhere, Oklahoma. But one fateful night, when Bird fills in for her dad by singing lead, a scout in the audience offers her a spotlight all her own.Soon Bird is caught up in a whirlwind of songwriting meetings, recording sessions, and music-video shoots. Her first single...