D.C. and 33 states now have to argue in favor of specific remedies and fines, which could be paused if Live Nation appeals. Experts say the long-term impact on ticket prices isn't clear either.

Billie Eilish, Fall Out Boy, Nile Rodgers, Cyndi Lauper, Lorde, Sia, Diplo and Chappell Roan are among the signatories of an open letter urging a Senate committee to support the Fans First Act.