ABC NewsMost Taylor Swift‘s fans know that 13 is her lucky number, but it appears as though her love of it is causing some problems.

E! News reports that the singer is being sued by Lucky 13, a California clothing company that was established in 1991.  A lawsuit filed on Tuesday accuses Taylor of trademark infringement, claiming unauthorized use of the company’s registered trademarks. According to E!, the company has reached out to Taylor and her camp several times, to no avail.

E!’s report doesn’t specify exactly when and how Taylor allegedly used these trademarks.  She does paint the number 13 on her hand before her concerts, for example, and some of the shoes in her footwear line for Keds come with a special charm incorporating the number 13, but it’s not clear how these would count as trademark infringements.

Taylor’s attraction to the number 13 stems from the fact that December 13 is her birthday, and also for its odd re-appearance in her life at key moments. 

As she told MTV, “I turned 13 on Friday the 13th. My first album went gold in 13 weeks. My first No. 1 song had a 13-second intro. Every time I’ve won an award I’ve been seated in either the 13th seat, the 13th row, the 13th section or row M, which is the 13th letter. Basically whenever a 13 comes up in my life, it’s a good thing.”

Except this time, apparently.

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