Twins who have become Instagram hits for their matching, four-foot-wide bottoms claim their success is simply down to an eye-watering 2,000 squats a day.
Miriam and Michelle Carolus, who have garnered nearly 250,000 followers on social media, say they have not gone under the knife to get their large derrières.
Instead, they claim their behinds are the result of a dedicated regime that sees them mirror each other’s lifestyle – including diet and exercise schedule – to pedantic detail.
“We make sure we eat the same, exercise the same – everything the same,” said Michelle, who even phones her sister to compare calories when they are apart.
“We try to do a couple of thousand squats a day to keep in shape. It won’t be all at the same time. It will usually be stretched over something like nine hours.”
But they claim they would never have never surgery on their bottoms.
“We would never consider surgery on our bu tts – our workout plan pretty much takes care of that,” said five-foot tall Miriam.
“And when you do it naturally through hard work it makes you feel a lot better about yourself.”
The siblings, who live next-door to each other in Miami, were extremely close growing up, prompting their mother to try to separate them.
They were put in separate classes at school, but reunited at college to study to become medical technicians.
Their looks have drawn attention throughout their lives but it was only two years ago that they decided to break into urban modelling as the ‘Double Dose Twins’.
Michelle, who is 45 minutes older than her sister, said: “It started off with Instagram. We’d never had social media before then.
“We posted a picture and got a lot of attention from the first shoot we did.
“We’ve had a lot of bookings for magazines and offers to travel. Modelling is actually a lot of fun.”
The twins have earned $30,000 (£21,000) between them and flown as far as Dubai for modelling contracts.
To maintain their identical measurements, they have enlisted the help of Bahiem King, 30, owner and founder of King Fitness, to create a tailored regime.
He combines a mixture of boxing, MMA, plyometrics, soft-touch CrossFit, weight training and a lot of squats to achieve the women’s ‘part Beyonce, part Serena Williams’ look.
During their main daily workout, the twins perform hundreds of squats.
They then go on to squat up to 100 times each hour over eight to nine hours – building up to a maximum of 2,000.
They also mirror each other’s diets down to extreme detail, putting the exact same calories in smoothies, salads and protein shakes and fat burners.
Miriam, who like her sister measures 36-22-46, said: “We generally stick to a healthy diet and it’s the same all the time. We are very strict about this.
“We will work out the exact same and make sure that if one of us has done more the other will have to catch up.”
She added: “It’s like a mirror. If I ever want to know if I’m looking good or not I will just look at my sister.
“We have the same hobbies and if one of us gets something for their house, the other has to as well.
“We actually lived together until last year but now we’re just neighbours. We still spend nights at each other’s house every other day but if one gets on the other’s nerves we can just tell them to go home.”
And the sisters’ dedication to their matching lifestyle is really starting to pay off.
Miriam, who like her sister is single, said: “It’s not hard for us to get attention from guys but it’s hard for them to get attention from us.
“When we are out in a club we get a lot of attention and there will be a lot of double takes of us.
“Some guys even think they can go after us together, which is so lame. We share most things but we’ll never share a guy.”
For now, the siblings are concentrating on their careers.
They admit their mother and other protective relatives have reservations about their modelling dreams, but they are ploughing ahead anyway – and even looking for acting parts.
“Our ambitions are to build a brand for the future, travel more and get rich,” said Michelle.
“It’s been a lot of fun so far and we don’t want that to stop.”