The pop superstar has to change her contact details once every few days.

Beyonce changes her email address every week, according to Ed Sheeran, who collaborated with the songstress on his track ‘Perfect’.

“I have an email address I email to get in touch with Beyonce. It actually changes every week. So I emailed that and we got on the phone, and it’s been in the works since May,” he said.

Meanwhile, Ed was thrilled to get the songstress on the track, which is off his hit album ‘Divide’, and enjoyed having her input on the backing track too.

“Thank you to Q for the best act in the world today award” – love ed x

A post shared by Ed Sheeran (@teddysphotos) on Oct 19, 2017 at 12:01am PDT

A post shared by Beyoncé (@beyonce) on Oct 17, 2017 at 10:03pm PDT

“Obviously she had twins [in June], and we finished the song in September, so I’ve been holding onto it since then … The original version of ‘Perfect’ was just an acoustic guitar and she rung me up and was like, ‘I don’t know how you feel about this but I’ve taken all the instruments off it and it’s just gonna be acoustic guitar,’ he added.

“I was like, ‘Ah that’s great, because it used to be that!’ Then when we got in together, it wasn’t so much notes, it was very much like a back and forth thing, like, ‘What’d you think of this?’ Or ‘What do you think of this?’ and [we were] probably in the studio for four hours. She was just like, ‘Right!’ Went in, one take, came out, like, ‘Yeah, that sounds alright!”

Got Beyoncé to duet with me on Perfect, comes out today at 7pm ET / 4pm PT / midnight GMT x

A post shared by Ed Sheeran (@teddysphotos) on Nov 30, 2017 at 3:31am PST

Ed had previously confessed he didn’t think Beyonce would have agreed to sing on the track.