pretty little liars

The nation's big retailers are betting on exclusive lines to ring up back-to-school sales, and also targeting kids and teens where they wile away the hours -- online -- with digital campaigns designed to both entertain and stoke a social-shopping experience tailor-made for the tech-savvy generation.

Increasingly, shows such as Gossip Girl, America's Next Top Model and Pretty Little Liars are incorporating songs into their scenes and then featuring them in online playlists. It may seem like a minor promotion, but for some bands, the results have been nothing short of astounding.