Aquilla Flood, 17, was recently voted prom queen at Campus High School in East Orange.
She was shot to death, allegedly by her ex-boyfriend, as she slept in her own bed last week.
A funeral service was held at Christian Pentecostal Church in Newark.
A federal task force arrested 18-year-old Almuqqadin Means on Monday and charged him with murder.
Means also faces weapons charges stemming from the slaying.
Prosecutors allege Means somehow sneaked into the home and shot Flood in the head early Wednesday. She was found dead by her mother hours later.