From Tupac living his best life in Cuba to LaToya Jackson and Michael Jackson being the same person, there are some madcap conspiracy theories out there.
But just when you think you've heard it all, a new one emerges to blows your socks off.
However, while most bizarre claims are usually started by just one kook, this one was validated by hundreds who all claimed to have witnessed one of the most mind-blowing scenes in the history of everything.
They reckon they saw Justin Bieber shape-shift into a giant lizard at an airport in Australia in 2017.
According to the wild theory, Bieber is actually an alien reptile who accidentally unveiled his true form whilst walking through Perth airport.
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Local website Perth Now reportedly carried the headline, "Hundreds of Fans Claim They Saw Justin Bieber Turn Into a Giant Reptile.
And one 'local skater' told the publication Bieber, "was hanging around with this big guy, his bodyguard I guess, and we were just staring because he kept turning into a huge reptile.
"His bodyguard was pointing at us, shouting that he’d kick our teeth in if we didn’t put our phones away.”
Witnesses claimed Bieber's eyes went black and he grew taller and had scales all over his body.
“There were girls hiding in toilets, crying. Guys were running for the exits, jumping into taxis to get out of there," another onlooker said.
And fuel was added to the fire of madness when fans claimed a court video of Bieber from 2014 showed him blinking slowly like only a lizard can, with eagle-eyed viewers alarmed when his eyes seemingly changed part way through.
But although it's a good yarn, Perth Now denied ever running the story, suggesting the whole thing was made up.
