Britney Spears. FKA twigs. Selena Gomez. These are three extraordinarily powerful women who could hire virtually any lawyer in the country, yet when faced with deeply personal legal battles unfolding under intense public scrutiny, they have all turned to the same Biglaw litigator: Greenberg Traurig’ Mathew Rosengart.
His latest celebrity client is Gomez, who was recently sued alongside her mother Mandy Teefey and entrepreneur Daniella Pierson over Wondermind, the mental-health startup they co-founded.
The plaintiffs, two entities that invested nearly $1.2 million in the company, allege that they were misled about Wondermind’s leadership, infrastructure, and prospects for success and sued for fraud.
Rosengart says the claims against Gomez don’t have a leg to stand on. “The allegations that Selena Gomez engaged in any way whatsoever in any purported ‘fraud’ or other wrongdoing are completely meritless, both factually and legally,” he told PEOPLE and other publications. “We will vigorously defend these false allegations and indeed are filing a motion to dismiss the baseless claims against her.”
At this point, defending famous women in highly publicized legal battles has become something of a specialty for the former federal prosecutor. Rosengart, who co-chairs Greenberg Traurig’s national media and entertainment litigation practice, became a household name — at least in households that follow both Biglaw and pop culture — after Spears selected him as her attorney in 2021. He filed a motion for her father’s suspension two weeks after Spears hired him, and within months, her father was removed as conservator and the conservatorship itself was terminated. Above the Law named him its 2021 Lawyer of the Year, while Spears repeatedly credited him with changing her life.
More recently, Rosengart began representing FKA twigs, whose real name is Tahliah Barnett, in her continuing dispute with Shia LaBeouf. Barnett previously sued the actor for sexual battery, assault, and emotional distress. Following a June 2025 settlement, in response to a December 2025 arbitration filed against her by LeBeouf, she filed a new lawsuit alleging that LaBeouf was attempting to silence her through an illegal nondisclosure agreement. According to The Hollywood Reporter, Barnett is asking a court to declare portions of that agreement unenforceable under California law.
Celebrities are hardly strangers to litigation, and Biglaw firms are hardly strangers to the entertainment industry. But Rosengart occupies a rare space. In addition to representing corporate players, he personally represents the stars — often when their legal problems are at their most consequential and most public.
“Although I wouldn’t necessarily have predicted this while at DOJ, it’s truly a privilege to protect and represent these, and all of my clients — whether celebrities or large corporate clients,” Rosengart told Above the Law.
From freeing Britney Spears to challenging an allegedly unlawful NDA for FKA twigs and now defending Selena Gomez against fraud claims, Rosengart has carved out one of Biglaw’s most unusual practices.
When powerful women need a powerful advocate, and the entire world is watching, Rosengart seems to be the Biglaw lawyer they trust.
Staci Zaretsky is the managing editor of Above the Law, where she’s worked since 2011. She’d love to hear from you, so please feel free to email her with any tips, questions, comments, or critiques. You can follow her on Bluesky, X/Twitter, and Threads, or connect with her on LinkedIn.
The post Why Britney Spears, FKA Twigs, And Selena Gomez All Trust The Same Biglaw Lawyer appeared first on Above the Law.
Britney Spears. FKA twigs. Selena Gomez. These are three extraordinarily powerful women who could hire virtually any lawyer in the country, yet when faced with deeply personal legal battles unfolding under intense public scrutiny, they have all turned to the same Biglaw litigator: Greenberg Traurig’ Mathew Rosengart.
His latest celebrity client is Gomez, who was recently sued alongside her mother Mandy Teefey and entrepreneur Daniella Pierson over Wondermind, the mental-health startup they co-founded.
The plaintiffs, two entities that invested nearly $1.2 million in the company, allege that they were misled about Wondermind’s leadership, infrastructure, and prospects for success and sued for fraud.
Rosengart says the claims against Gomez don’t have a leg to stand on. “The allegations that Selena Gomez engaged in any way whatsoever in any purported ‘fraud’ or other wrongdoing are completely meritless, both factually and legally,” he told PEOPLE and other publications. “We will vigorously defend these false allegations and indeed are filing a motion to dismiss the baseless claims against her.”
At this point, defending famous women in highly publicized legal battles has become something of a specialty for the former federal prosecutor. Rosengart, who co-chairs Greenberg Traurig’s national media and entertainment litigation practice, became a household name — at least in households that follow both Biglaw and pop culture — after Spears selected him as her attorney in 2021. He filed a motion for her father’s suspension two weeks after Spears hired him, and within months, her father was removed as conservator and the conservatorship itself was terminated. Above the Law named him its 2021 Lawyer of the Year, while Spears repeatedly credited him with changing her life.
More recently, Rosengart began representing FKA twigs, whose real name is Tahliah Barnett, in her continuing dispute with Shia LaBeouf. Barnett previously sued the actor for sexual battery, assault, and emotional distress. Following a June 2025 settlement, in response to a December 2025 arbitration filed against her by LeBeouf, she filed a new lawsuit alleging that LaBeouf was attempting to silence her through an illegal nondisclosure agreement. According to The Hollywood Reporter, Barnett is asking a court to declare portions of that agreement unenforceable under California law.
Celebrities are hardly strangers to litigation, and Biglaw firms are hardly strangers to the entertainment industry. But Rosengart occupies a rare space. In addition to representing corporate players, he personally represents the stars — often when their legal problems are at their most consequential and most public.
“Although I wouldn’t necessarily have predicted this while at DOJ, it’s truly a privilege to protect and represent these, and all of my clients — whether celebrities or large corporate clients,” Rosengart told Above the Law.
From freeing Britney Spears to challenging an allegedly unlawful NDA for FKA twigs and now defending Selena Gomez against fraud claims, Rosengart has carved out one of Biglaw’s most unusual practices.
When powerful women need a powerful advocate, and the entire world is watching, Rosengart seems to be the Biglaw lawyer they trust.
Staci Zaretsky is the managing editor of Above the Law, where she’s worked since 2011. She’d love to hear from you, so please feel free to email her with any tips, questions, comments, or critiques. You can follow her on Bluesky, X/Twitter, and Threads, or connect with her on LinkedIn.
