(CNN) - Chris Kelly, one-half of the 1990s rap duo Kris Kross, died Wednesday at an Atlanta hospital after he was found unresponsive at his home. He was 34.

How Kelly died isn't known, and the Fulton County Medical Examiner's Office said an autopsy is planned for Thursday.

Kelly, together with Chris Smith, shot to stardom in 1992 with "Jump," which spent eight weeks on top of the Billboard Hot 100.

The duo opened for Michael Jackson that year on his Dangerous World Tour.

And their penchant for wearing their clothes backward were, at least for a time, widely emulated.

"I'm wearing my clothes to work backwards tomorrow," Michael Skolnik, editor in chief of the hip hop site Global Grind said, when he learned of the death.

Leslie Tookes, a CNN project coordinator, lived next door to Kelly. Like others, she too was saddened by his untimely death.

"We often heard him playing classical music and the piano," Tookes said. "He was a low-key type of person who was very talented and courteous, friendly and wonderful to our 5-year-old twins.

"Indeed, gone too soon."