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Katy Perry keeps getting upstaged by a certain part of her anatomy: Her cleavage.

The sexy singer performed a free concert at Hollywood & Highland last night for the premiere of her new film, "Part of Me" -- and did it by turning her most famous body part into a pair of movie reels.

Of course, this is nothing new for Katy.

The performer has been making headlines with her ample chest for years now -- and was even banned from "Sesame Street" once because of it!

From cupcakes to whipped cream guns, Katy keeps finding crazier ways to highlight her cleavage.

Check out her wildest looks above!

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