Ariana Grande is upping her security after a fan pounced on her during the Singapore premiere of new movie Wicked: For Good , leaving the star traumatized.

RadarOnline.com can reveal the singer, 32, remains haunted by the terror attack at her Manchester concert in May 2017 which left 22 of her fans, many of them children, dead and thousands injured. Article continues below advertisement

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And incidents like Thursday's, when a fan jumped the rails as she walked the "yellow carpet", are incredibly "triggering" for her.

An insider told The Daily Mail : "Ariana has been trying to soothe herself because her mind automatically jumps to the darkest possibilities

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