(CNN) R. Kelly pleaded not guilty to a slew of charges in federal court in Brooklyn, New York, on Friday, including counts of racketeering, kidnapping, forced labor and sexual exploitation of a child.

The judge ordered that the singer remain in custody pending his trial.

Kelly was charged last month in the Eastern District of New York in an indictment that also accused him of violating the Mann Act by coercing and transporting women and girls across state lines to engage in illegal sexual activity as far back as 1999.

The indictment details alleged incidents in four states: Illinois, Connecticut, California and New York. Five Jane Does are referenced throughout the document, including three minors.

The indictment also alleges Kelly, 52, exposed at least one person to a sexually transmitted disease without disclosing it.