The pushback against Bill Cosby continues in the new year with two women joining fellow accuser Tamara Green's recently filed defamation lawsuit and claiming statements from the comedian's representatives have labeled them liars in the public eye.

Green initially filed her suit Dec. 10 in U.S. District Court in Springfield, Mass., near where Cosby owns a home. Attorney Joseph Cammarata filed an amended complaint yesterday to include the new plaintiffs, accusers Linda Traitz and and Therese Serignese.

"We certainly welcome other people standing up to Bill Cosby to redress harm caused to them by statements made by Mr. Cosby through his lawyer and spokespeople," Cammarata told People magazine.

Serignese contends that Cosby drugged and raped her in 1976, while Traitz alleges that the comedian attempted to drug and grope her sometime in 1970. Green, for her part, maintains that Cosby drugged and sexually assaulted her in the early 1970s.

Cosby attorney Martin Singer, however, appears to have been unfazed by the defamation lawsuit in general, telling People following the initial filing, "We are very confident that we will prevail in this proceeding and we will pursue other claims against the attorneys who filed this action."

Green first came forward with her sexual assault accusations in the Daily News in 2005, shortly after which she says Cosby representatives began making attempts to discredit her. Ultimately, she says, the same thing happened when she came forward again in 2014.

Traitz came forward via a Facebook post in November 2014, and Serignese first told her story publicly last month after serving as Jane Doe No. 10 in Andrea Constand's 2005 lawsuit, which was settled out of court in 2006.

Cosby, meanwhile, has vowed to resume his tour with several stops in Canada that begin tomorrow. More than 20 women have come forward to accuse the comedian of sexual assault.