Maybe we should have made a spur of the moment trip toLondon yesterday. Katy Perry decided to pop in on a screening of her 3D concertdocumentary Katy Perry: Part of Me on some unexpected fans across the pond! Words cannot describe our jealousyright now.

Showing up behind the concession stand counter, Katy handedout popcorn to movie goers, while later she actually sat in the audience withthe fans. And yes, Katy definitely rocked those 3D glasses and STILL lookedgood.

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After her surprise appearance and fan bonding moment, Katywrote on her Twitter, "Hadtons o' fun in London today at a surprise screening...Wish I could sit w/ allof u when u see ‪#KP3D pic.twitter.com/aeH15MU0."Hey, you never know -- maybe when you check out her film on July 4^thKaty could be sitting in the seat next you! Dare to dream, right?

What celebrity would LOVE to head to the movies with? Let usknow in the comments section below! Justin Bieber totally gets our vote. 

Photos Courtesy of Getty Images