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

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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

​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