Madonna Macy's Material Girl clothing line sunglasses mannequin in store black leather gingham bustier blazer

Who is the real "Material Girl"? Madonna at Macy's with one of her new clothing line's looks.

Madonna's foray into fashion with her Material Girl juniors line, sold exclusively at Macy's, has hit a sudden snag.

According to RadarOnline.com, the California-based clothing manufacturer L.A. Triumph slapped Madonna with a lawsuit on Aug. 19, claiming it's been using the registered Material Girl name on its own juniors clothing range since 1997, selling the goods in big retailers such as Nordstrom and Ross.

In court documents posted on Radar, L.A. Triumph says,"Between 1997 and present day, L.A. Triumph and its predecessor have sold millions of dollars of the Material Girl brand of clothes in commerce throughout the United States and have spent large sums in its promotion and advertisement."

The papers go on to explain that Madonna "improperly filed a United States Trademark Application for the Material Girl mark" in December 2009 and that the pop star's brand is now directly competing with -- and threatens to eclipse -- L.A. Triumph's label of the same name.

Though didn't Madonna coin the term "Material Girl" -- it is her nickname after all -- when she released the 1985 hit song? Just sayin'.

"Madonna and MGB's clothing line for young women has garnered significant press attention for its risqué advertising campaign," says the statement, referring to the Lourdes-styled ads featuring former "Gossip Girl" star Taylor Momsen.

"Plaintiff's Material Girl clothing line retails at the same general price point and in the same general retail space as the Defendant's infringing clothes."

The lawsuit also hints at next going after retailer Macy's for promoting Madonna's clothing line.

So far Madonna and her team have offered no response.

In related fashion-meets-legal news, read about the new CFDA-supported act that aims to protect a designer's intellectual property.