Singer R. Kelly, who already faces state sexual abuse charges in Illinois, has now also been hit with 18 federal charges, including for allegedly taking underage girls across state lines for sex, according to indictments unsealed in New York and Chicago on Friday.

The 52-year-old R & B star was walking his dog in Chicago on Thursday and smoking a cigarette when he was arrested for federal indictments that say Kelly and his employees recruited women and girls to engage in illegal sexual activity with the performer and paid victims and witnesses to cover up his crimes.

An indictment unsealed Friday in the Eastern District of New York includes five criminal counts, including for racketeering, transporting underage girls for sex, and sexual exploitation of a child. The accusations go back as far as 1999.

R. Kelly leaves the Cook County courthouse after a hearing in his child support case in Chicago on March 13, 2019. Kamil Krzaczynski / Reuters file

It says that once Kelly had convinced victims to be with him, they "were not permitted to leave their room without receiving permission from Kelly, including to eat or go to the bathroom."

Victims were also told to keep their heads down, to avoid eye contact with other men and "were required to call Kelly `Daddy,' " according to the New York indictment, which involves five unidentified victims.

Two of those victims in the New York case were 16 and another one was under 18, authorities said.

The illicit acts happened in New York, Illinois, Connecticut and California, according to federal prosecutors in New York.

"Kelly and the other members of the enterprise traveled throughout the United States and abroad to perform at concert venues, to promote the R. Kelly brand and to recruit women and girls to engage in illegal sexual activity," the New York indictment says.

It also alleges he engaged in "sexual activity with girls under 18 years old, engaging in and facilitating sexual activity without disclosing a sexually transmitted disease Kelly had contracted and producing child pornography."

In Chicago, he was hit with 13 federal charges, including for sexual exploitation of children and possession of child pornography.

Authorities in Chicago accused Kelly of engaging in sex acts with five minors who he met between 1996 and 1999, according to an unsealed indictment.

Kelly gave $30,000 to the father of one of the victims and transferred title of a GMC Yukon Denali to that child, according to the Chicago indictment.

Federal prosecutors out of Chicago also targeted two of his associates, Milton "June" Brown and Derrel McDavid on child pornography charges for allegedly helping Kelly conceal videos he took of illicit sex acts.

"R. Kelly believed he could fly, but it will be justice to see his oppressive wings clipped," according to a statement from Angel Melendez, special agent in charge of the New York office of Homeland Security.

The singer's defense lawyer, Steve Greenberg, said in a statement Friday that the federal charges stem from "decades-old" allegations that "he was acquitted of" previously. He didn't elaborate.

Kelly just wants to make "wonderful music and perform for his legions of fans that believe in him," Greenberg said.

The federal indictments come as Kelly faces state prosecution in Illinois. He was charged in February with aggravated sexual abuse involving four women, three of whom were minors when the alleged abuse occurred. Kelly has pleaded not guilty to these charges.

In May, he was charged with 11 more state counts of sexual assault and sex abuse in Illinois, according to court documents. He pleaded not guilty to those charges.

Kelly, wearing an over-sized orange jumpsuit with short sleeves, was not handcuffed when he made a brief courtroom appearance in Chicago on Friday afternoon.

Kelly said, "Yes ma'am" when Magistrate Judge Sheila Finnegan asked he understood the charges being filed against him.

The singer will remain jail until his next hearing on Tuesday, and prosecutors said they'll oppose any request for bail.

"He poses a significant threat to minor girls in the community," prosecutors wrote on Friday. "He continues to live a lavish lifestyle and has the means and incentive to flee."

Allegations of sexual misconduct against Kelly gained renewed interest following the release in January of a six-part Lifetime documentary series, "Surviving R. Kelly," which detailed a number of women's claims that they were sexually, physically and mentally abused. Kelly denied all of those accusations.

In 2008, a jury in Cook County, Illinois, acquitted Kelly of child pornography charges stemming from a video that prosecutors said showed him having sex with a girl as young as 13. The young woman denied that it was her in the video and didn't testify.

“Our thoughts are always with the brave women who came forward," according to a statement from Lifetime. "It is their bravery and courage that allowed them to tell the stories that made this happen."

The parents of Joycelyn Savage, a woman who has been staying with Kelly, claim the singer has brainwashed their daughter and is holding her. The family hopes the new charges against Kelly will prompt their reunion with Joycelyn.

“They feel vindicated. They feel eager to meet with their daughter and get back to a regular, normal life," family lawyer Gerald Griggs told NBC News on Friday.

“We’re glad that the victims’ voices are finally being heard and justice will be served in this case," Griggs said.

Jocelyn Savage's parents on Friday confronted Darrell Johnson, a crisis manager for R. Kelly, when the publicist tried to conduct a press conference in Atlanta.

"I want to know where my daughter is!" dad Timothy Savage screamed, as he was held back from approaching Johnson. "Where is she at? Answer that question!"

The publicist said Savage and other women connected to R. Kelly are with him on their own free will.

"These are grown women, I'm not in charge of them," Johnson said. "I'm not a babysitter."

In a video released in May 2018, Joycelyn Savage denied she was being held against her will.