Hundreds of mourners prayed and lit candles at the Evesham Township Memorial Complex.
The 22-year old was shot and killed Friday night as she signed autographs after a show in Orlando.
Her brother Marcus was with her and was able to tackle the suspect.
Police have called him a hero and say he saved lives.
Marcus and Grimmie's friends were at the vigil and shared memories of the singer.
"She's awesome. She loved this town. She loved this state. She loved singing. She loved the Lord and she loved me. She was just my baby sister," Marcus said.
Grimmie was a YouTube star widely known from her appearances on NBC's "The Voice."
She lived in Evesham Township before moving to Los Angeles in 2012.
Grimmie was shot by 27-year-old Kevin Loibl, who died after turning the gun on himself.
Detectives are now searching his cell phone and social media accounts to determine a motive.
Police say he traveled to the show specifically to target her.