by Vera H-C Chan Was there a calculated generational appeal happening on " American Idol " during the ladies' round? Tuesday night's repertoire included crusty classics from the Animals, Fleetwood Mac, Carole Bayer Sager, Patsy Cline, and even one Charlie Chaplin-penned ditty. The strategy's not necessarily bad, aside from the risk of being compared to the original. After all, the "Idol" core Search audience are ladies in their late 20s through the 50s.