Singer Madonna has termed allegations of being drunk during her Kentucky concert as "sexist", and said she never drinks before a live performance.

The 57-year-old singer was accused of being under the influence of alcohol on stage and mocking the locals at the Kentucky concert on Saturday. It was also reported that she allegedly spoke in a fake hillbilly accent" during the Rebel Heart Tour show. 

The singer blasted the critics for fuelling the rumours through a post on Instagram. She also shared an image of herself mid-song at the show and captioned it with a lengthy explanation, reports dailymail.co.uk. 

The post read: “For those people who like to believe all they read I never drink and perform! My show is 2 hours and 15 minutes of non stop singing and dancing. In Louisville I made a joke about doing a stand comedy act dressed as a clown and being able to drink alcohol.

“Its so very interesting how society continues to not only treat me in a totally sexist way (if I a were a man no one would have said a thing) and also continue to take everything I say literally! That's what happens when people don't read books and get all information from TMZ.”

The post was liked by more than 65,000 people and generated a slew of supportive comments. 

One fan wrote: “This was the best damn concert I've ever been to. And there's no way she could have performed the way she did drunk. It was amazing!"

The post comes after criticism which surfaced over the weekend, in which one concert attendee told TMZ that “Madonna was very drunk”. 

Another fan added “Madonna was an awesome performer but man she was a b**ch! trashed talked Kentuckians and spoke in a fake hillbilly accent”.