This is Shimmi Munshi, who claims to have stopped aging at 20 despite being in her 40's.
“I feel like the female version of Peter Pan — the girl who never grew up.”
This youth seems to come at a price, however, as she has a disease by the name of gastroparesis, which is just a fancy way of saying she vomits up to 60 times a day. (Source)
So we gotta ask...
If you could stop aging at 20 – but had to throw up 60 times a day, would you?