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Katy Perry

Dave J. Hogan / Getty Images for Paramount Pictures International

That is one hot concession-stand worker—wait a second!

Being all slick and sly (but in a good way, of course) Katy Perry surprised her London fans at a secret screening of her documentary Part of Me by showing up behind the counter at the concession stands.

Popcorn, anyone?

As if getting some tasty treats from the superstar wasn't enough, she also joined the eager movie watchers in the audience for the screening. And yes, she wore the 3-D glasses (and still looked adorbs).

"Had tons o' fun in London today at a surprise screening...Wish I could sit w/ all of u when u see ," Perry tweeted.

Part of Me will be released in theaters on July 4.