Katy Perry Crashes Australian Prom

Perry sings 'California Gurls' for a group of Australian high school students at their formal dance.

Katy Perry loves a good party. Who could forget her celeb-filled, Willy Wonka-themed birthday party last October? So, when Perry came across students celebrating their prom during a recent trip to Australia, the "California Gurls" singer decided to embrace her inner teenage dream and crash their party.

According to Radar Online, Perry got her groove on at the Melbourne High School formal at the Grand Hyatt on Friday night. It happened to be the same hotel that Perry was staying at during her time Down Under. One student, Stefan Uzelac, told the website that Perry made her way into the party when she heard "California Gurls" playing, grabbed a microphone and started singing along.

"It was towards the end of the night and everyone was having a good time," Uzelac said. "Then Katy Perry decides to walk in and crash our formal!"

"She appeared slightly drunk and was stumbling a little," another student added about the 10 minutes that Perry spent at the party. "As she grabbed the microphone, she was surrounded by highly excited students and began singing along with the soundtrack. She was dancing and laughing with students until the end of the song when she was subtly whisked away by her security guards. Everyone went nuts and it was the perfect ending to our evening."

In a photo posted on Radar, Perry is seen wearing a black-and-white top and singing into a microphone surrounded by the prom revelers. Aceshowbiz.com reported that Perry also danced and sang along to Beyoncé's "Single Ladies." ''Someone came over to me and said Katy Perry had heard about our formal, and wanted to come," student council president Anthony Lay explained. "But she's a celebrity and there were more than 550 students in the room, so another person, a woman, said it would be too dangerous."

Perry later tweeted about the night, writing, "I totes just crashed a prom!!!" The pop star moved on to Tokyo, where she has yet to crash any proms, but has been busy eating at themed restaurants and getting dressed up like Harajuku girls.