R. Kelly was charged with 11 new counts of sexual assault and abuse stemming from an alleged January 2010 incident, the Chicago Sun Times reports.

The new set of charges, which Cook County prosecutors filed Thursday, are the most serious R. Kelly has faced so far. They include four counts of aggravated criminal sexual assault, two counts of criminal sexual assault by force, two counts of aggravated criminal sexual abuse and three counts of aggravated sexual abuse against a victim aged 13 to 16. The four aggravated criminal sexual assault charges are classified as Class X felonies and carry a potential prison sentence of up to 30 years. Kelly is scheduled to appear in court June 6th. Read more in Rolling Stone.