A 21-year-old San Diego resident has been identified as one of three people who died at the HARD Summer Music Festival this past weekend.
The festival took place at the Auto Club Speedway in Fontana on July 30 and 31, approximately 50 miles east of Los Angeles.
Alyssa Dominguez, 21, of San Diego, died early Sunday morning at Kaiser Foundation Hospital in Fontana after she was transported from the music festival, the San Bernardino County Coroner's Office said.
She had lived in Chula Vista and attended Olympian High School and San Diego State University.
Paulo Cruz, a close family friend of Dominguez says he's heartbroken after learning of her death Monday morning.
"She was just a really loving, caring girl," he told NBC 7. "Every time I was with her, she was just full of laughter, full of joy. And that's what kept everyone happy. Hearing her laugh kept us happy."
Cruz had also been at the festival but says did not attend with Dominguez.
"I really can't explain it. It's just so unreal. Just cause we were close, our families were close," he said.
Cruz says Dominguez was well-known on social media because she did a lot of promotions for clothing brands.
"I just want everybody to know that she was an amazing person," he said. "She's beautiful, loving and caring and she'll always be remembered and missed," Cruz said.
Derek Lee, 22, of San Francisco, died early Sunday at Arrowhead Regional Medical Center after attending the festival. Roxanne Ngo, 22, of Chino Hills, died early Monday at Loma Linda University Medical Center.
The Coroner's office said the deaths are under investigation. They are not believed to be related.
The Festival was moved from its 2015 location at the Los Angeles County Fairground in Pomona to a new spot this year after two college students -- including a Coronado High School graduate -- died of drug overdoses.
Nearly 150,000 people attended HARD Summer this year, according to the San Bernardino County Sheriff's Department. Nine people were transported from the festival over the weekend, including the three people that died.
Authorities arrested 325 people over the weekend, mostly for public intoxication.
No other information was immediately available.