"She jumped in the cab and took them to the hospital," said a detective who asked not to be identified.
"It was excellent," the detective said. "It was probably what saved his life. Here she was, a victim of a crime in a stressful situation, and she was cool, calm and collected."
Police questioned two men last night after finding Latifah's green 1995 BMW on a street in Far Rockaway, Queens, near where one of them lives. But neither man was charged with a crime.
Moon, 22, was in critical but stable condition with a gunshot wound to the abdomen.
Latifah, 25, whose real name is Dana Owens and who stars on the Fox television series "Living Single," was in the car with passenger Lynn Mayo, who was sitting in the backseat. Mayo also was unhurt.
Latifah reportedly flew to California last night and didn't comment about the carjacking.
"Thank God, he's going to be OK," said Moon's uncle Luther Chrisp. "He was shot for the car, that's all."
Chrisp said Moon was about to try out for the New York Jets and met Latifah ''at a disco a few years back." Moon worked at the time as a bouncer at the disco.
Detectives don't believe the carjackers singled out the BMW because Latifah was behind the wheel.
Unlike many other rappers, Latifah has not glorified violence in her rap music and has taken other rap artists to task for portraying women as sex objects.