The woman with the biggest breasts in the world left TV viewers speechless today after she appeared on This Morning.

Martina Big has undergone drastic cosmetic surgery and tanning injections, in her controversial bid to become African.

The 31-year-old appeared on the flagship ITV daytime show to reveal her recent body modification - the biggest breast implants in the world.

The implants are said to hold 20 litres each, which is equivalent to carrying two water coolers on her chest.

On the programme, Martina said: "I will eventually have 20L on each side, at the minute they are being topped up because they need to stretch and the breast tissue has to grow.

"I have had a specially made sports bra and I've been training my back muscles so they can take the weight."

The German model, who has appeared on numerous TV programmes across the world, said she even felt her breasts "growing as they pump[ed] the saline in."

A shocked Phillip Schofield questioned her admission of being able to "handle more," asking how she would cope with the additional weight.

He said: "Not all doctors are prepared to do it are they?

"I mean how are you going to sleep and bending down to put shoes on must be so hard."

The actress said she would sleep on her back if necessary and implied her husband would help put her shoes on.

She further admitted plans to reduce the size of her breasts in the future, but mentioned a desire to invest in bum implants first, as reported by the Liverpool Echo .

She explained: "When I'm really old, I'm pretty sure I'll go a little bit down, but now I'm going bigger, bigger and bigger. I like big breasts!"

ITV viewers were unsurprisingly stunned by the model's appearance, with one labelling it was "uncomfortable viewing."

"Martina would be better off investing her money into a decent psychiatrist," wrote another viewer who criticised the potential of further body modification.

"Nobody can change their race and nobody with sense wants breasts out of all proportion to their body," commented one viewer.

Another said they "feel sorry her her," whilst one claimed it was "impossible" for someone to carry such weight on their breasts.

"The pain you will end up in is not worth it," one viewer responded.