Fuentes was celebrating his 45th birthday with friends on Thursday (16Jun16) in the Brighton Park neighborhood on the Southwest Side, when someone approached the car he was in and ordered him at gunpoint to get out of the vehicle.

The Chicago Tribune newspaper reports that when he refused, the gunman shot multiple times into the car, hitting Fuentes in the head three times. He was in a critical condition and rushed to the city's Mount Sinai Hospital.

According to the Cook County medical examiner's office, he was pronounced dead at the hospital at 2.07pm on Saturday (18Jun16).

Police initially said he had been pronounced dead soon after the shooting, but he was placed on life support so relatives could arrive from Mexico, according to the newspaper.

NBC Chicago report the gunman fled on foot after the shooting, where he was then picked up by a car. Police said on Saturday they have no one in custody over the attack, and are still investigating if it was a failed robbery or carjacking.

Fuentes got through to the top 10 in the Mexican version of The Voice - called La Voz - in 2011, and gained a huge following. He moved to Chicago three years ago, and opened an academy for young performers in the city called Tras Bambalinas.

"We are feeling confused and we have no explanation why all these things are happening,” said his friend Miguel Sanchez, whose two children attend the academy. "We are very sad because it's something you don't expect to happen to your close friends."

Victor Gulley, co-founder of A Taste of Theatre Festival in Chicago, said of his friend: "He was one of the most talented people I have ever known. He could sing, he could dance, he could write the music, perform it and most importantly he could teach it. I've never ever met anyone as talented as he was in those arenas."

The tragic news comes just one week after the death of Christina Grimmie, who appeared on America's The Voice. She was shot dead last Friday (10Jun16) while greeting fans after a concert in Orlando, Florida.