Chris Kelly, known as one half of the 1990s US rap duo Kris Kross, has died at the age of 34 in what police say may have been a drug overdose.
Police were called to Kelly's home in south Atlanta at around 4:30pm (local time) on Wednesday.
He was taken to the south campus of the Atlanta Medical Centre and pronounced dead around 5pm.
Corporal Kay Lester of the Fulton County police said "it appears it may have been a possible drug overdose".
A post-mortem examination is due to be carried out to establish an official cause of death.
His mother, Donna Kelly Pratte, told police her son had taken cocaine and heroin before he died, and that he had a history of drug abuse.
Kelly, known as "Mac Daddy," and Chris Smith, known as "Daddy Mac", were introduced to the music world in 1992 by music producer and rapper Jermaine Dupri.
He had discovered the pair in an Atlanta shopping centre.
Their most famous song was the frenetic Jump, taken from their multi-platinum debut album Totally Krossed Out.
And they were also known for their fashion style, wearing their clothes backwards.
Jump reached number one in the US and Australia and two in the UK.
Their musical achievements led to instant fame. They toured with Michael Jackson, appeared on TV shows, and even had their own video game.
The duo was never able to match the success of their first song, though they had other hits like Warm It Up and Tonite's Tha Night.
Earlier this year, the pair performed together to celebrate the anniversary of Durpri's label, So So Def.