As she navigates the tricky transition from Gossip Girl's good girl to rock singer, Taylor Momsen has made a number of iffy sartorial choices, including see-through dresses, garters and ripped tanks. But some wondered whether she crossed a line in October when she performed with her band in a rhinestone necklace that spelled out the world slave along with a dog collar attached to what looks like the beginning of a chain. Momsen, who's made no secret of her disaffection for having been signed to a modeling contract at age 2, might want to check a history book for a little perspective.