Kelly, from Port Talbot, Wales, explained why she used the salon: "I thought I would go really, really brown, but I didn't, I went really red.
The tanning salon Kelly used
"And now I'm not allowed to go in the sun for 10 years and if I do I could get skin cancer."
Kelly's mum had given her some money to go to a local fair, but when Kelly got there it was closed.
So she took her money and spent it in the salon instead.
Now Kelly has learnt her lesson, and hopes other children won't have to.
Doctor's tips for sun safety
She said: "I would like the suntan places to be shut down, because if a seven-year-old or a six-year-old goes on there longer than me, they would have to have a skin graft and it will be really painful."
Newsound did ask the people who run the tanning salon to speak to us about this story, but they didn't want to.
There are no laws on how old someone has to be to use a sunbed, but from September in Scotland no-one younger than 18 will be allowed to use one.