Glaser, Weil, Fink, Jacobs, Howard & Shapiro filed the case Tuesday in Los Angeles. The firm has numerous high-profile clients and recently won judgments for architect Frank Gehry and television host Bob Barker.
The lawsuit claims Stewart owes for work on three cases, including one involving the singer's cancellation of a December 2000 show in Las Vegas. A federal jury decided Stewart owed the Rio hotel-casino $2 million for canceling the show.
The firm also represented the Rock and Rock Hall of Famer in a trademark infringement case and a lawsuit filed by a concert promoter.
Stewart's manager was not immediately available for comment.
