On 'American Idol,' the gimmicks don't always work. Texas beauty Halie Hilburn learned that lesson on tonight's (Jan. 31) audition episode, which took place in Oklahoma City. Hilburn is a ventriloquist and she took the stage with Oscar, her hand puppet. He held her back, since they dueted and she yodeled on '(I Want to Be) A Cowboy's Sweetheart.' She was inches from dismissal when she ditched Oscar and sang Gavin DeGraw's 'More Than Anyone,' proving she can sing. Boy, can she sing.