Katy Perry was “stunned” by an extraterrestrial — and now, 14 years later, she faced a different kind of invader. Perry, currently on her Lifetimes Tour, was performing her 2008 hit “Hot N Cold” at the Qudos Bank Arena in Sydney,

The pop star Katy Perry had to pause a concert in Sydney, Australia on Monday night after a deranged fan ambushed her onstage. Video that has quickly gone viral shows Perry, 40, singing her 2008 hit song “Hot N Cold.

Katy Perry was left visibly stunned when a fan crashed the stage during her performance in Australia, wrapping an arm around her and jumping before being wrestled away by security. The incident happened at the Qudos Bank Arena in Sydney as Perry was midway through her hit "Hot N Cold.