Beyoncé’s Lemonadeis up for nine Grammy awards this year including Best Urban Contemporary R&B Album and Album of The Year.

However, a recent $20 million lawsuit filed by the sister of a murdered New Orleans bounce artist may hurt Bey’s celebratory mood.

According to The Advocate, Angel Barre, sister of Messy Mya, said that Beyoncé used her brother’s “voice, performance and words from his copyrighted works to create the tone, mood, setting and location of the New Orleans-themed ‘Formation’ video and audio recordings” without authorization or permission.

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Messy Mya, born Anthony Barre, was shot dead in 2010 after leaving the baby shower of his pregnant girlfriend.

In the then-surprise release of the “Formation” visual Super Bowl weekend last year, Lemonade‘s first single used Messy Mya’s “Booking the Hoes of New Wildings” and “A 27 Piece Huh.”

Barre is suing for royalties and seeking writer, composer, producer and performer credit to her brother. Beyoncé’s label Sony Music and a company both owned by her and husband Jay Z (possibly Parkwood Entertainment) are named in the lawsuit as well.

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Barre alleged that both the “Formation” video and the Lemonade video album committed copyright infringement. However, the samples using Messy Mya’s vocals don’t appear on the hour film or actual album, only the “Formation” video alongside sound bits from Big Freedia.

Watch The “Formation” video below.