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WATCH: World’s tiniest Katy Perry fan rocks out to ‘Dark Horse’

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When Eva Baker’s baby daughter is upset, only one thing can make it better — Katy Perry.

As the song “Dark Horse” comes on, the fussy baby can be seen nodding her approval and then pumping her little arms when the verse kicks in.

After watching the video, Perry herself jokingly offered to babysit the little girl.

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