Blunt soon realised his mistake and took to Twitter to address the embarrassing blooper.
"Oops... Just emailed the whole of the UK by mistake! Ha!," the singer wrote.
The email apparently had the subject line: "I'd like you to be the first to hear my new single."
It also had a personalised message by Blunt, saying, "So ... Just for you ... Here's the first single from my new album...!"
In the mail, Blunt says that his new track was "about love, life, fear and hope and more than anything, you...And me..."
