Marina Diamandis was due to begin the shows this Thursday (May 3), but has had to push the gigs back a month as she has damaged a vocal cord.
"It is with huge regret that I have had to postpone my UK tour dates due to medical advice," Diamandis said.
"I have been experiencing vocal problems for three weeks now and consequently today the doctor has told me that I cannot sing performance length shows while I undergo treatment, or I could cause permanent damage to my vocal cords."
She added: "I am distraught as I was so looking forward to seeing you all on The Lonely Hearts Club tour. The good news is that we have managed to reschedule all the dates - except Leeds which is a festival - starting from June 18.
"I promise that these shows will be the best I have ever performed for you, as hopefully I will be 100% healthy!
"All existing tickets will be valid for the new dates and I also promise my Leeds Diamonds that I will see them in the autumn.
"As you know, today is the release date for Electra Heart and the people who buy my records and concert tickets mean the world to me. I hope you understand that not being able to play for you in May is very upsetting."
> Marina and the Diamonds streams 'Electra Heart' - listen
The rescheduled tour dates are as follows:
June 18 - Norwich, Waterfront
June 20 - Glasgow, ABC
June 21 - Edinburgh, Queens Hall
June 22 - Manchester, Cathedral
June 24 - Leamington, Assembly Hall
June 25 - London, Tabernacle
June 27 - Cardiff, Corn Exchange
June 29 - Birmingham, Institute
June 30 - Sheffield, Leadmill
Watch the music video for Marina and the Diamonds' latest single 'Primadonna' below: