R. Kelly

The disgraced former R&B star is already serving 30 years for sex trafficking and racketeering. On Thursday, he was given one more year in prison for having made pornography with three children.

The additional sentence from last year's child pornography and enticement convictions in Chicago would add to 30 years the R&B singer and songwriter recently began serving in a New York case.

Jurors will have to sort through a month of evidence and arguments on charges accusing the singer of producing child pornography, enticing minors for sex and rigging his 2008 child porn trial.

R. Kelly's federal trial in Chicago is starting. The singer faces a slew of legal battles and was already sentenced in New York to 30 years in prison for sex trafficking and racketeering.

The R&B star was convicted in New York last year of sexual exploitation of a child, bribery, sex trafficking and racketeering.

Allegations against the R&B singer have been made for decades. But several investigative reports, including the documentary "Surviving R. Kelly," led prosecutors to take another look.

A jury found the disgraced R&B star guilty of charges that included sexual exploitation of a child, racketeering and sex trafficking. He faces a possible sentence of 10 years to life in prison.

Over the five weeks of testimony, federal prosecutors presented 45 witnesses, including 11 alleged victims.

The accuser also alleges that Kelly physically and sexually abused her, and first pressured her into sex when she was a 17-year-old high school student who went to him for career mentorship.

Surviving R. Kelly and Framing Britney Spears are among a growing list of documentary projects challenging audiences to reconsider old controversies with fresh eyes.