Sabrina Moss, of Neasden, north-west London, died after being caught up in the double shooting at 4.12am.
Police said that she and her friends were simply "in the wrong place at the wrong time."
Her grieving parents issued a statement today describing their devastation at a "horrific incident" that had changed their lives forever.
"She cherished working as a nursery teacher and treasured working with the children, who undoubtedly will miss her dearly," they said.
"We urge anyone with any information to contact the police to help catch those responsible."
The cause of Ms Moss's death was confirmed as a gunshot wound to the chest.
- Anyone with information that might assist the investigation was asked to call the incident room at Hendon on 020 8358 0300. To remain anonymous, call Crimestoppers on 0800 555 111.