The Mercedes Benz Sprinter flipped over on the road before it collided with the truck, Lt. Jeremy Burkett of the Alabama Law Enforcement Agency told USA TODAY.
Stone, who was a passenger in the van, was declared dead at the scene. Eight other passengers of the van were injured and transported to hospitals for treatment, Burkett said.
The Grammy-nominated singer rose to prominence in the 1970s as a member of female rap group The Sequence before a solo career that produced hits like “Wish I Didn’t Miss You.” She was also a member of the R&B trio Vertical Hold.