Backstreet Boys singer Nick Carter has won a favourable ruling in one of two civil lawsuits filed against him, one by a woman who alleges he raped her on his tour bus in 2001 and another by a woman who alleges he sexually assaulted her on his boat in Florida in 2003.
A Nevada state court judge on Wednesday declined to dismiss a countersuit that Carter and his lawyers brought alleging defamation by three people in the first case, which was filed last December by a Nevada woman, now 40, who alleges that Carter attacked her on his tour bus in 2001 after a concert in Tacoma, Washington, when she was 17 years old.
"He told plaintiff she would go to jail if she told anyone what happened between them," the woman's lawsuit said.
"He said that he was Nick Carter and that he had the power to do that."
The other case involving the Florida allegations from 2003 was filed on Monday in Clark County District Court.
Carter, now 43, lives in Las Vegas. He has denied the allegations of sexual battery and infliction of emotional distress the two women make against him. Each woman seeks unspecified monetary damages greater than $US30,000 ($A46,000).
Carter appeared with his lawyer in court on Wednesday when Clark County District Court Judge Nancy Allf declined to dismiss his counterclaim accusing three people — including a third woman who alleged he raped her in 2003 — of defamation, conspiracy and abuse of process.
The judge's decision means that woman, Melissa Schuman, and her father, Jerome Schuman, will have to answer Carter's allegations that they have waged a campaign to profit from his fame. Carter is seeking more than $US2.3 million ($A3.5 million) in damages.
"For years, Melissa and Jerome Schuman have been conspiring with anyone they could manipulate to drum up false claims against Nick Carter in a brazen attempt to get rich off of him," Carter's lawyer, Liane Wakayama said in a statement on Thursday to The Associated Press.
Schuman lost her bid in California in 2018 to have prosecutors bring a criminal complaint against Carter based on her allegation that he forced her into sex in his Los Angeles-area apartment.
Carter has denied Schulman's accusations that he raped her. He did not speak during Wednesday's court hearing.
Lawyer Alan Greenberg, representing the Schumans, maintained in court that Carter was a public figure, that the allegations against him have merit and that Melissa Schuman reported to two friends and a therapist in 2003 that she had been sexually assaulted.
The Associated Press generally does not name people who say they were sexually assaulted, but Schuman has spoken publicly about her experience and approved of the use of her name.
Carter's lawyers maintain the Schumans did not make their allegations public until late 2017, after a broad social movement galvanised by the hashtag #MeToo began exposing previously untold cases of sexual violence.
They also allege the Schumans "recruited" the woman who accused Carter of sexual assault in Florida.
That plaintiff, who lives in York County, Pennsylvania, asks in court documents to be identified only by her initials. She alleges that Carter raped her on his yacht in 2003 when she was 15 years old and they met in Marathon, Florida.
"This case illustrates how much time, courage, and perseverance it takes for victims and survivors to come forward about child sexual abuse and seek justice," Margaret Mabie, the woman's New York-based lawyer, said in a statement.
"Despite numerous complaints about Carter's past conduct towards young women, his victims continue to struggle to hold (him) publicly accountable for his harms against them," Mabie said.
The Backstreet Boys formed in 1993 and are best known for such hits as I Want It That Way, As Long As You Love Me and Everybody (Backstreet's Back).