It's said that imitation is the sincerest form of flattery. But vanity flatters no one. Certainly that's so in an interesting trademark spat that pitted music-loving fans on one hand and a maker of intimate and bedroom apparel on the other.
The seminal case relating to the principle of likelihood of confusion in trademark use is the 1973 decision by the Court of Customs and Patent Appeals (CCPA) in In re E.I. du Pont de Nemours & Co.