The most viewed video of all time a.k.a. A Cancer Called Despacito has disappeared from YouTube following a hacker attack that seems to have targeted many high-profile music videos. The clip was replaced by an image of a gang wearing masks and holding guns -- they call themselves Prosox and Kuroi’sh.

However, this wasn't an isolated incident. In what appears to have been an attack on major Vevo accounts, videos by the likes of Taylor Swift, Shakira, and Drake have either disappeared or have had their thumbnails altered.

Both YouTube and Vevo are still to comment on the matter.