5 Seconds of Summer’s former management company, YM&U Group, is suing the Australian pop-rock band for breach of contract, according to court documents reviewed by Billboard. Filed in California Superior Court on Dec. 17 by YM&U attorneys Howard King and Stephen Rothschild of King, Holmes, Paterno & Soriano, the complaint alleges that 5SOS – with the encouragement of their current manager, Benjamin Evans – has refused to pay YM&U commissions the firm is owed for multiple lucrative deals it negotiated on behalf of the group, including a $10 million single-album recording contract with BMG and a $1.5 million merchandising extension with Bravado International Group. Evans is named as a defendant in the lawsuit alongside 5 Seconds of Summer members Luke Hemmings, Calum Hood, As...