A new antitrust lawsuit filed against Apple on Dec. 31 claims the company has an illegal monopoly on the digital music market. The plaintiff, Stacie Somers, and her representation claim that Apple is dominating the market for online video and music sales, as well as the digital music player market, and that its position is a violation of the Sherman Antitrust Act. “Apple has engaged in tying and monopolizing behavior, placing unneeded and unjustifiable…