Their first, and by far most successful song, was "Jump." The hit, off their multiplatinum 1992 debut album "Totally Krossed Out," featured the two trading verses and rapping the refrain, the song's title. The duo had surprising maturity in their rap delivery, though the song was written by Dupri. It would become a No. 1 smash in the United States and globally, and one of the most popular of that year.
Their success led to instant fame: They toured with Michael Jackson, appeared on TV shows, and even had their own video game.
The group was never able to match the tremendous success of their first song, though they had other hits like "Warm It Up," and "Tonite's tha Night."
In 2009, after photos surfaced that showed Kelly with bald spots on his head, there were rumors that he had cancer. But in an interview posted on YouTube by Straight from the A TV, he said he suffered from alopecia, a condition in which people lose their hair.
"My health is good, I just got alopecia, I don't have cancer, not other sort of diseases," he said.
Earlier this year, the group performed together to celebrate the anniversary of Durpri's label, So So Def.
Wells Gabriel reported from Washington. AP Entertainment Writer Nekesa Mumbi Moody in New York and writer Jeff Martin in Atlanta contributed to this report.