Father John Misty, aka Josh Tillman, is no stranger to pop collaborations - after all, he did work/tour with Lana Del Rey last year.

However, few people would have expected his name to show up in the writing credits for Beyoncé's new album, 'Lemonade'.

Tillman has explained to Billboard how he came to write the first verse and refrain of album track 'Hold Up', a track which also featured writing credits by Vampire Weekend frontman Ezra Koenig as well as producer Diplo.

He said: ""About a year and half ago, my friend Emile Haynie played Beyonce some of my music, along with some tunes I've written for other people, back when she was looking for collaborators for the record... Pretty soon after they sent along the demo for "Hold Up", which was just like a minute of the sample and the hook.

"I'm pretty sure they were just looking for lyrics, but I went crazy and recorded a verse, melody and refrain too that, unbelievably -- when you consider how ridiculous my voice sounds on the demo -- ended up making the record -- right between picking up the baseball bat and decapitating the fire hydrant [a reference to the video]. The first verse and refrain is my lyrics and melody."

He added that he did not know that his work had made the final cut until he met Beyoncé at Coachella last year.

Vampire Weekend's Ezra Koenig also took to Twitter to explain his involvement, which was based on the Yeah Yeah Yeahs song 'Maps':