New Delhi, Nov. 13 -- The Asia-Pacific premiere of 'Wicked: For Good' in Singapore on Thursday evening took a disturbing turn when a serial intruder, identified as Australian man Johnson Wen, breached security and physically approached Ariana Grande on the yellow carpet.

According to eyewitnesses, Wen - infamously known as "Pyjama Man" for his history of public disruptions - jumped over a barricade and suddenly hugged the pop star, leaving the crowd and security stunned. Grande's 'Wicked' co-star Cynthia Erivo reacted instantly, pushing Wen away and standing protectively in front of Grande until security personnel subdued and arrested him.

Videos of the incident, recorded by attendees and later shared online, show the visibly startled s...