Rita Ora recently paid a visit to one of the toughest detox camps in the world, to help get into “perfect shape” for the summer.

Viva Mayr clinic in Austria is not for the faint-hearted. Rita, 22, was taught how to chew her food between 30 and 40 times before swallowing washing it down with magnesium powder mixed in warm water. All at a cost of £1,500-a-night.

A source told the Mirror: “It’s the most opulent weight-loss and detox clinic in the world, and pretty hardcore.

“Rita wants to get in perfect shape for the summer and her forthcoming promo appearances. This was a last-ditch, and extreme, measure. Following a detailed examination and fitness test, she was given a rigid diet-and-exercise regime, with a few deep-tissue massages thrown in for good measure.

“The food is mainly boiled potatoes and broths, and guests are taught to savour their food by chewing it a minimum of 30 times per mouthful.”

The sourse adds adds: “The progamme set for Rita was designed to be a blueprint for the rest of her life, helping her keep on the straight and narrow.”

Viva Mayr is described as “sophisticated medical diagnostic clinic housed in a modern, five-star hotel”, which has previously been visited by stars such as Liz Hurley.