Today in conspiracy theories about pretty girls getting secretly kidnapped while continuing to produce content: apparently, some Sia fans are worried that she's been kidnapped by Beyoncé, and that Beyoncé is holding her in a makeshift prison ("cativeiro," in Portuguese) forcing Sia to produce songs for her. Needless to say, there seems to be no actual evidence for this, but that has never stopped the internet before.

Sources: h/t BuzzFeed