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JonBenét Ramsey, Katy Perry

RP Studio/ZUMA Press, Shearer/Getty Images for Gigantic

Conspiracy theories can often be fun and they can also be pretty darn crazy, and this theory really has knocked our socks off.

Famous conspiracy theorist Dave Johnson posted a 7-minute video on YouTube in 2014 that claimed pop star Katy Perry is none other than JonBenet Ramsey, the child beauty pageant star who was murdered 20 years ago. The video is making its way around the Internet once again, resurfacing the thought that the "Roar" singer really is a grown up version of the young girl. Ramsey didn't die, Johnson claims, she just sacrificed her name for fame.

Johnson notes that when a photo of Perry is placed over a picture of Ramsey, they look identical. He also claims Perry's parents, Keith Hudson and Mary Perry, are in fact Ramsey's parents, only thinner. (Note: Patsey Ramsey died of ovarian cancer in 2006.).

Other YouTubers have supported Johnson's claims, noting that Perry's eyebrows look like Ramsey's.

If you are baffled by this conspiracy theory, get a load of these two theories that have also taken the Internet by storm:

1) Avril Lavigne died and was replaced by a doppelganger. Yes, apparently after the release of her hit album, Let Go, Lavigne spiraled into a depression and was found dead in her home. Conspiracy theorists claim Melissa Vandella replaced her, citing missing moles and blemishes as their proof.

2) Pippa Middleton wore a fake butt to Kate Middleton's wedding. That's right, the royal heiney that debatably hijacked the royal wedding was purportedly a fake, according to a "royal expert" who studied it for three years. But months later Pippa laughed off the speculation, joking that the dress might have fit "a little too well."

Do either of these two strike a chord with you? Sound off in the comments below.

Watch the video to hear celebs weigh in on a different conspiracy theory.