Remember the classic Paul is Dead conspiracy? The theory that Paul McCartney was killed in a car accident at the height of the Beatles's fame and replaced by a lookalike? Well, the 21st century music industry now has its own twist on the tale. And in keeping with its modern origin, it's a little more tech-savvy.

In recent years, a small but vocal subculture has argued that the Beyonce we all remember from the days when she was lead singer with Destiny's Child has been replaced by a clone. The outlandish theory was first spotted by The Root, which shared the following screenshot of a Facebook post showing the supposedly clear physical difference between the 'old' Beyonce and her cyborg replacement.

The 'reptoid hypothesis' is a conspiracy theory which advances the argument that reptilian humanoids live among us with the intention of enslaving the human race. It has been championed by former BBC sports presenter David Icke who believes that deceased American comedian Bob Hope, members of the Royal Family and former US Presidents George W Bush and Bill Clinton are part of the "Anunnaki" race who came to earth for "monatomic gold". Some critics accused Icke of anti-Semitism, alleging that his talk of reptiles was code for Jews – but he clarified that the lizards to which he referred were literal, not metaphorical.