A Singapore court sentenced an Australian man to nine days in jail on Monday for rushing film star Ariana Grande at the Asian premiere of "Wicked: For Good" last week.

Grande and other stars were attending the opening night of the film at Universal Studios in the city-state when the man, identified by court papers as 26-year-old Johnson Wen, jumped a barricade and put his arm around the actor.

Video clips, which have gone viral online, show the man wrapping his arm around a shocked Grande before jumping up and down and smilingly waving to the crowd.

Grande's co-star Cynthia Erivo then rushes to her defence and the man is grabbed by security guards and dumped back over the barricade.

Wen was arrested hours later and charged with "being a public nuisance".

"This act was premeditated," S

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