Grande was recently in New York City supporting boyfriend Ethan Slater on Spamalot's opening night on Broadway, and she was signing autographs and taking photos with fans who were waiting outside after the show.
In one scary moment, a fan ran up behind the singer and grabbed her as he tried to take a photo with his phone.
You can watch the terrifying encounter below.
Security jumped into action and pushed the man away, but the moment had Grande's fans concerned.
Many felt her security team could have done a better job protecting her.
Several also commented on intrusive fan behavior and treatment of celebrities in general.
After the alarming incident, Grande continued to smile and sign autographs before getting into her waiting ride.
What a horrifying moment. We're glad she's okay!