Top 5 celebrity prom crashers: Justin Bieber, Jessi Cruickshank and more

While Katy Perry was in Australia in 2010, a local high school happened to be holding their prom at the same hotel. Katy reportedly heard her song, “California Gurls,” being played by the DJ and she rushed into the dance to sing along to the tune. Later, Katy tweeted: “I toted just crashed a prom!”
Photo © Getty

In 2009, during the premiere of their Disney Channel movie, ‘Princess Protection Program,’ Selena Gomez and Demi Lovato snuck into Etobicoke Collegiate Institute’s high-school prom in Toronto. Selena later tweeted, "PPP peeps and I crashed a prom tonight and danced with a highschool!! amazing!! I finally had prom!"
Photo © MySpace/Selena Gomez

Jason Derulo, too, tried his hand at prom crashing when he showed up to LA’s Culver City High School formal. The “Watcha Say” singer performed a handful of his songs on stage and even announced the school’s prom queen and king!
Photo © Jason DeRulo/YouTube