The 30-year-old singer had been speeding at 102mph on a highway in New Mexico in September.
Harris ended up clipping the car in front of her and careened into the path of oncoming traffic.
Earlier in the day, in a video that was posted to her Instagram account, Harris could be seen getting teary and emotional after driving for 12 hours. In some parts of the video, she was slurring her words...
An autopsy has revealed Harris had a blood-alcohol content of .28 at the time of the collision - more than three times the legal limit. Cruz had no alcohol in her system.