Grande's co-star, Cynthia Erivo, intervened by pushing Wen off the singer, who appeared visibly shaken by the incident.
Prosecutors described Wen as a 'serial intruder' during sentencing, noting his history of crashing star-studded events and attention seeking.
The incident sparked outrage due to Grande's past experience with post-traumatic stress disorder following a 2017 terrorist attack at her Manchester concert.