Welsh singer Katherine Jenkins has been left devastated by the death of her best friend.

Lifestyle writer Polly Noble lost her longrunning battle with cervical cancer over the weekend (10-11May14) and Jenkins has told fans of her heartache after hearing the news.

Taking to Twitter.com, she writes, "Heartbroken. Rest in Peace my darling friend."

Noble had started a successful blogging career sharing her wellness tips as she overhauled her diet and fitness after being diagnosed with the disease at the age of 24.

The pair became pals when Jenkins acted as voice coach for a Noble's girl band.