Like many identical twins, Jo and Kerry Burton have always done everything in tandem - from coming down with chickenpox to donning tutus for ballet lessons.
So when Jo decided to have cosmetic surgery on her nose, Kerry naturally followed suit.
The sisters have since spent £60,000 on a host of operations - all carried out at the same time by the same doctors - to ensure they cannot be told apart.
They even had to have their initials written on their bellies so the surgeon knew who was who.
Now 34, they have had a breast enlargement, eye-lift, permanent make-up tattoos and Botox jabs.
'It might sound barmy to some to have cosmetic surgery just because your twin is having it,' said Kerry, a single mother to son Drew, 15 months.
'But we would hate to look different, so we had to have the cosmetic surgery together. We both had chickenpox together as children and we had the same hobbies, such as Brownies and dancing - and so our identical cosmetic surgery has followed on from that.'
The twins had the first operation to put a curve in their noses when they were 21. The idea came from a photographer who was working with the sisters on a modelling job.
At 26, the twins, who own a beauty salon in Hoddesdon, Hertfordshire, began having regular Botox injections to iron out the first hint of wrinkles.
In 2004 - not long after Jo had daughter Jade, now seven - they paid £4,500 each for breast implants, taking them from a 34B to a 34DD.