Singer R. Kelly was found guilty Monday on all nine federal charges related to sex trafficking and racketeering, prompting reactions on social media that noted the many years he has faced unsettling accusations.

Kelly, whose real name is Robert Sylvester Kelly, faced charges of bribery, sexual exploitation of a child, forced labor, and violations of the Mann Act.

The guilty verdict comes after Kelly was the subject of many sexual allegations with underage women for most of his career. In 1994, when Kelly was 27 years old, he married 15-year-old singer Aaliyah. In 2000, the Chicago Sun-Times reported allegations that Kelly had sex with minors. In 2008, Kelly was the defendant in a child pornography case and was acquitted of all the charges.

“Today’s guilty verdict forever brands R. Kelly as a predator who used his fame and fortune to prey on the young, the vulnerable, and the voiceless for his own gratification,” Jacquelyn Kasulis, the acting U.S. attorney in Brooklyn, told a crowd of reporters Monday at the federal courthouse.

Kelly, 54, will be sentenced on May 4, 2022. He faces a mandatory minimum sentence of 10 years in prison and could receive life in prison.

"I've been practicing law for 47 years. During this time, I've pursued many sexual predators who have committed crimes against women and children. Of all the predators that I have pursued, Mr. Kelly is the worst," said Gloria Allred, an attorney for some of the victims.

ABC News' chief legal analyst Dan Abrams said Tuesday on "Good Morning America" that he expects Kelly will get life in prison. "Regardless of what this sentence is, I don't expect him to ever walk free again," Abrams said. 

Twitter users had immediately reacted to the guilty verdict.