Bratz dollmaker MGA Entertainment Inc. has sued to block what it claims is an improperly awarded $23 million prejudgment lien granted to its onetime lawyers at Orrick, Herrington & Sutcliffe, Reuters reports. The complaint accuses the downtown Los Angeles firm of breaching confidentiality provisions of an arbitration agreement in connection with its handling of MGA’s litigation against Mattel Inc. over the Bratz line.