A fan named Johnson Wen attacked Ariana Grande at the premiere of "Wicked: For Good" in Singapore, as she walked the yellow carpet with co-star Cynthia Erivo.Grande, who appeared visibly shocked, was rescued by Erivo after Wen jumped the barricade and wrapped his arm around her, prompting security to escort Wen off the premises shortly after the incident.Following the event, fans have called for Wen to be arrested or deported, citing a history of disruptive behavior including approaching Katy Perry earlier this year.