Katy Perry's music is apparently becoming a bigger influence based on a recent video that makes a little baby go from upset to happy in one instant.

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The pop star posted the video to her Twitter page on Monday where the infant is strapped in a carseat and not looking happy. She's making random noises and looking like she's about to cry. As she fusses for about 10 seconds, all of a sudden a familiar tune starts to play- one of Perry's biggest hits "Dark Horse."

As the beginning of the song starts, the baby literally goes from fussy to excited as her mouth makes an oval shape and her eyes widen. She then starts to shake out her hands that go with the beat of the music when Juicy J. introduces the song. The infant even nods when the rapper says, "Uh-huh."

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When Perry's voice can be heard, the child adds more hand motion and even giggles.

The singer captioned this video, "Available for babysitting at 10 dollars an hour & 4 Oreos" with a link. She also recently spoke with "Rolling Stone" about her future that she's hoping will involve children of her own- with or without a man.

"I don't need a dude," Perry said, as published by Us Magazine. "It's 2014! We are living in the future; we don't need anything. I don't think I'll have to, but we'll see. I'm not anti-men. I love men. But there is an option if someone doesn't present himself."

Check out the video of the happy baby below.

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Katy Perry