Rapper Nelly was arrested in Tennessee after his tour bus was searched by police and discovered to have methamphetamine, marijuana and drug paraphernalia.
He was charged with drug-related crimes.
The US rapper's tour bus was stopped on Saturday morning by a Tennessee Highway Patrol officer for failing to display the required inspection stickers.
The officer then reportedly decided to do a full search of the bus, which was headed to St Louis following a show in North Carolina, after smelling marijuana.
Tennessee Department of Safety and Homeland Security issued a statement saying a police search led to the discovery of "five colored crystal-type rocks that tested positive for methamphetamine, as well as a small amount of marijuana and other drug paraphernalia."
Local tv reports said that police discovered 100 small Ziploc bags and a number ofguns.
The 40-year-old, whose real name is Cornell Haynes, is facing charges of possession of drugs and drug paraphernalia.
The star was taken to Putnam Country Jail and has since been released on bail and is due to appear in court on June 19.
