Grammy-winning artist Lizzo is facing a federal copyright lawsuit over an unreleased song snippet that referenced actress Sydney Sweeney’s jeans campaign and allegedly sampled a 1975 soul track without permission.

The GRC Trust, which owns the rights to Sam Dees’ “Win or Lose (We Tried),” filed the complaint Tuesday in U.S. District Court in California. The suit accuses Lizzo of “copying and exploiting” the composition in a 13-second clip posted to her Instagram and TikTok in August. Though the track was never commercially released, the trust is seeking an injunction to block future use and damages for alleged profits and losses.

“We are surprised that The GRC Trust filed this lawsuit,” Lizzo’s representative said in a statement. “To be clear, the song has never been commercially released or monetised, and no decision has been made at this time regarding any future commercial release.”

The clip, now deleted from Lizzo’s social media, featured her in denim washing a Porsche while rapping, “I got good jeans like I’m Sydney”—a nod to Sweeney’s American Eagle ads that played on the phrase “great jeans” as a pun on “great genes.” The campaign drew criticism for promoting narrow beauty standards, prompting Lizzo to parody the ad in a follow-up video captioned “Lizzo’s got good jeans.”

Fans dubbed the track “Good Jeans” or “I’m Goin’ In Till October,” but GRC attorneys say prior settlement talks failed, leading to the lawsuit. The trust claims the snippet borrows the bassline and melody from Dees’ original, a funky soul cut from his 1975 album. GRC, which also sued Kanye West this month over a separate Dees sample, argues Lizzo’s clip generated unauthorized buzz and potential earnings despite lacking formal copyright registration.

This isn’t Lizzo’s first encounter with copyright disputes. In 2019, producers alleged her hit “Truth Hurts” was based on their demo “Healthy,” a case that settled privately. Separately, writer Mina Lioness received co-writing credit after claiming Lizzo lifted the song’s viral lyric—“I just took a DNA test, turns out I’m 100% that bitch”—from her tweet.