Apparently Beyoncé is pretty hard to get a hold of if you don’t have her phone number.

While being interviewed at the iHeartRadio Jingle Ball this past Friday, Ed Sheeran disclosed how Beyoncé routinely changes her email address.

In order to get in touch with Beyoncé, Sheeran said, “I have an email address that I email … that actually changes every week… So I emailed that and then we got on the phone, and it’s been in the works since May.” The song he’s referring to is their newly-released duet of Ed’s original hit “Perfect.”

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The “Thinking Out Loud” singer also spoke to why it took so long to put the duet together, including the birth of Beyoncé’s twins. Though once they got in the studio, it amazingly only took her one take to lay the perfect vocals for the track, and even added her own flare to the instrumentals.

The song is so good that you should check it out again below.

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