In a surprising move, US pop star Taylor Swift has deleted the entirety of her social media posts overnight. 

While her accounts on Instagram, Twitter and Facebook all remain active, all posts from the singer have been deleted. Official site has also been blacked out, as reported Pitchfork

Speculation is now rife amongst fans, with suspicions that the move could be anything from a cyber hack to a stunt in promotion of a new album.

One fan has shared a screenshot from Swift's official account that says nothing more than "Midnight. They Don't Know." Swift's original tweet has since been deleted in the blackout.

This comes just days after Swift won her lawsuit against US radio host David Mueller, after a jury ruled that the singer was groped by Mueller at a concert in 2013.