Cynthia Erivo rushed to shield her

Videos of the incident quickly started to circulate online.

Footage shows Ariana, who famously portrays Glinda, walking the 'yellow brick road carpet' at Universal Studios Singapore along with her costars Michelle Yeoh, Cynthia Erivo, and Jeff Goldblum, when suddenly a man is seen charging at the pop star.

@dianadaytona I’m so mad this is so scary… and he even tried another time before he was finally kicked out #wicked #wickedforgood #wickedpremiere #arianagrande ♬ original sound - Diana Daytona 🎙️🤍

The man can be seen putting his arm around Grande to try and pull her close to him.

While Ariana can be seen trying to pull away, Erivo, who plays Elphaba in the film, lunged toward the two, pushing the man away while appearing to shout at him.

Security guards then quickly stepped in and removed the man from the carpet.

Ariana looked genuinely shaken up by the altercation as Erivo and Yeoh comforted her.

Fans were quick to identify the man who stormed the carpet as Johnson Wen, who goes by "Pyjama Man" on social media.

Wen took to Instagram to post his own video of the incident, captioning it: "Dear Ariana Grande thank you for letting me jump on the yellow carpet with you."

Wen is known online for crashing celebrity events. Back in June, he did a similar thing to Katy Perry, and in August, he crashed The Weeknd's show before security ushered him off stage, per People.

It didn't take long for Ariana's fans to come to her defence.

One wrote: "Do you think this is okay? This is sick! It ruined the experience for fans who dreamed of this moment and put lives at risk. All for pure ego! Seek help," while another commented: "You literally assaulted her. This isn’t a flex, it’s a crime. Shame on you!"

Grande has previously spoken about her struggle with PTSD following the 2017 bombing of her Manchester concert, which left 22 people dead.

"Yeah, it’s a real thing. I know those families and my fans, and everyone there experienced a tremendous amount of it as well," Grande told British Vogue in 2018.

"It’s hard to talk about because so many people have suffered such severe, tremendous loss … I feel like I shouldn’t even be talking about my own experience – like I shouldn’t even say anything. I don’t think I’ll ever know how to talk about it and not cry."