Alice Pyne from Cumbria was diagnosed with Hodgkin's lymphoma four years ago. The terminally ill teenager started an online 'bucket list' of all the things she wanted to do before she died. The touching blog went viral with millions of hits.
The 16 year old has since become a Pride of Britain winner as well as earning a British Empire Medal but her biggest achievement according to her was getting 40,000 to sign the bone marrow donor register.
Alice has today launched another drive to get more people to join up on twitter. She wants to get #onelifeliveit trending by 5pm tonight to find out more click here.