Pop star Katy Perry was surprised at her concert in Sydney on Monday when a fan briefly ran up to her on stage and grabbed her before being escorted away by security.

Katy Perry had an alarming moment when a fan jumped on stage and put his arms around her during her concert tour stop in Sydney on Monday, June 9.

A Katy Perry fan stormed the stage during a recent concert and was quickly escorted off by security. The pop star, 40, was in the middle of singing her hit tune "Hot N Cold" at the Qudos Bank Arena in Sydney on Monday when the incident took place.