Miranda Lambert has blasted claims she had surgery to slim down.

The country star faced was rumoured to have sought help in losing a dress size recently, but assured fans her new body is down to her own hard work.

She wrote on her blog: ''Though I NEVER care what the tabloids have to say about me... I wanted to address this certain story they are running this week and set the record straight.

''I DID NOT have surgery to lose weight. That is ridiculous. I lost my weight the healthy and good old fashioned way. Watching what I eat and working out with my trainer Bill Crutchfield. (sic)''

The 'Mama's Broken Heart' singer - who is married to fellow country star Blake Shelton - added she wasn't even counting how many pounds she lost, and wasn't get healthy to please anyone but herself.

She added: ''As for the assumed number of pounds lost...? I don't even know! Like I have always said, it's not about a scale, it's about how you feel and how your jeans fit.

''And on November 10th when I turned 30, my skinny jeans were finally baggy! Mission accomplished!

''So for anyone who is tempted to read the 'Trash Talk' please don't. I am proud to be a normal size girl and I want to encourage everyone to be confident at any size. Thanks for the support yall!''

Miranda has recently been confirmed she will appear on the next series of 'The Voice', but rather than help her husband - who is a mentor and judge on the show - she'll be joining Shakira's team to help coach contestants.