Queen Latifah has been arrested during an investigation into drink-driving allegations.
The 32-year-old hip-hop star was driving in North Hollywood when she was stopped for making an unsafe lane change in the early hours of Wednesday.
Officer Alex Delgadillo said: "Once she has made contact, they found that she was under the influence. It was a routine arrest."
The artist, who was driving a 2003 Cadillac Escalade, presented a valid New Jersey driver's license bearing her given name, Dana Owens, and then failed a sobriety test, Mr Delgadillo said.
Latifah had a supporting role in this year's romantic comedy Brown Sugar and is one of the stars of the upcoming movie Chicago.
She won a Grammy Award for best rap solo performance for the single U.N.I.T.Y.