Is winning top prize worth losing a friend?Allie Velasco wants to be a trailblazer.A trendsetter.A winner.No better feeling exists in the world than stepping to the top of a winner's podium and hoisting a trophy high in the air. At least, that's what Allie thinks . . . she's never actually won anything before. Everyone in her family is special in some way -- her younger sister is a rising TV star; her brother is a soccer prodigy; her great-grandfather...