Many pop songs have lighthearted origins, such as brainstorming sessions where artist friends bounce ideas back and forth. However, as the drama around Lizzo's hit song "Truth Hurts" shows, that sweet beginning can quickly turn sour. Two songwriting brothers claim they deserve to be credited as writers on the chart-topping track. The line at the center of their complaint is a key part of Lizzo's public identity: "I just took a DNA test, turns out I'm 100 percent that b." She reportedly filed to trademark the phrase and already features it on T-shirts sold on her website. In a New York Times article last week, Justin and Jeremiah Raisen argue that a version of the signature line from "Truth Hurts" first appeared in "Healthy." That's an unreleased song they worked on with Lizzo and two other songwriters in April 2017, they say. Copyright Law Cynthia Arato, a lawyer for Lizzo, told The Times in a statement that the Raisens "did not collaborate with Lizzo or anyone else" on "Truth Hurts." She also said that the Raisens "renounced any claim to the work, in writing, months ago." Songwriting disputes can be very complex. They involve copyright law, which involves who owns an idea and deserves to get paid for it. Recent high-profile copyright cases involved Robin Thicke's controversial mega-hit "Blurred Lines" and Katy Perry's "Dark Horse." The Line Between Inspiration And Plagiarism The dispute over "Truth Hurts" is somewhat unusual, because it argues that "Truth Hurts" borrowed from a song that was never released. And then there's the debate around the origins of the "DNA test" lyric. Some have said it walks the line between inspiration and plagiarism. In an interview with The Washington Post, veteran songwriter Justin Raisen said he never "knowingly signed away my rights or claims." He says for months he and his brother tried contacting Lizzo's team and producer Ricky Reed. Lizzo joined Reed's record label in 2016. The brothers say it began in September 2017. Back then Justin Raisen observed, in an email