No doubt about it, Fox's "Glee" is a pop-culture juggernaut. In 2009, the "Glee" cast landed 25 singles on the Billboard Hot 100, the most by any artist since The Beatles. The show is syndicated all over the world. Its second season debut scored more than 12 million viewers. Clearly, Fox knows that this show about a high-school glee club is a hot ticket for high-schoolers, and its appeal trickles down through the lower grades. They're the ones who are downloading all the "Glee" singles for their iPods.