Late last Thursday, apparel manufacturer L.A. Triumph Inc., filed suit against Madonna, claiming that her “Material Girl” line for Macy’s threatens their own “Material Girl” clothing line that they have been selling since 1997.

L.A. Triumph is hoping a judge will rule that Madonna’s new tween line creates confusion among consumers (“deception in the marketplace” in legalese) and that Madonna should fork over all her “Material Girl” profits to L.A. Triumph.

So how is it that Madonna, the original “Material Girl,” she who sang the song, could be infringing on L.A. Triumph’s trademark?

We checked in with our resident fashion trademark expert, attorney Anne Sterba, of leading intellectual property firm Rothwell, Figg, Ernst & Manbeck, to find out if L.A. Triumph has a leg to stand on. Read more on Fashionista.

Lauren Sherman is editor of Fashionista, a Breaking Media site.