Talia Joy Castellano, a 12-year-old girl, who has been fighting cancer for five years, has turned her harrowing story into an inspiration for thousands of young girls who tune into the teen's weekly make-up tutorials died on Tuesday.

Over 100,000 people subscribe to her YouTube page to watch her bubbly and expert makeup tutorials, where she uses makeup as a 'wig' and confidence booster. She was first diagnosed with stage four neuroblastoma cancer, a tumour that develops from nerve tissue in infants and children, on Valentine's Day in 2007.

She uploaded a video blog announcing she now has 'neuroblastoma and leukemia at the same time'. Although she says 'the chances of surviving are fewer than surviving,' she will continue her videos 'for as long as I can.'

She reveals during a video: 'You don't think, "Oh my god I'm going to die". It's more like, "I'm going to lose my hair, I'm going to be skinny, I won't be able to eat, go to school, see my friends."'

'When I put on my make-up I feel like I can embrace those features that I really like about myself. I feel if someone's looking at me, they're looking at my makeup, not looking at my bald head.

'I am just trying to make young girls, young adults, adults, anyone, feel beautiful by using makeup,' she adds.

Once a week, on top of enduring chemotherapy, radiation, stem cell transplants, and blood transfusions, she teaches her viewers how to master a make-up look that most girls are quick to put in the 'too hard basket'.

'Just fill it in sloppily,' she advises of a base layer. 'But focus on the eyelid because that's where we want most of the intensity and the yellow to stick.

'When you're using very vibrant colours like this you always want to use a base. One, it will prevent creasing, and it will give the eye shadow something to stick to,' she explains of a look inspired by fire and her 'fiery' bathing suit.

She also tells her fans that 'it's just for fun'.

'I just did this while my parents were in the pool and I was really bored. It's not hard at all. Some girls think it's so hard, being like "How do you do that?!" and I'm like "bro, it's"...never mind,' she trails off. She reveals her latest diagnosis to her fans, saying: 'I just wanted to tell you guys because I don't want it to be a secret.'

'Basically there are not really a lot of options for treatment anymore,' Talia explains to her viewers with the frank wisdom of few adults.

'I'm going to decide whether or not I want to do the bone marrow transplant, or whether or not I just don't do it and live the time I have remaining,' she says.

'This is not fair to me anymore. I'm only 13. I shouldn't have to be doing this...it's really not fair for kids to have cancer. It really frickin sucks.'

'I've gotten so many benefits from [cancer]. Having a YouTube channel, having to inspire people and having people look up to me... I adore, I love makeup, and using it as my wig... it's amazing... the journey of having cancer was amazing. But every journey has an end.

'Having cancer has been a gift, but it's a horrible, horrible thing,' she says.

My her soul rest in peace!

Cancer