If you haven't already heard about Mascarathon... where have you been?!
Benefit have arranged a big relay race, going from one end of the country to the other, all to raise money and awareness for Refuge, a charity for women and children against domestic violence, which actually affects 1 in 4 people in the UK... so it's a very good cause!
The Mascarathon starts tomorrow in Edinburgh, where Caroline Flack will be the first celebrity to run the race, holding the giant mascara baton. It ends in London on 29th June. On the Mascarathon website you can find out more about the places where you can run, and the celebrities taking part.
If you can make it to any of the events, there will be makeovers to be had and Benefit prizes to be won, so keep your eyes peeled.
Don't forget to add the hashtag #mascarathonuk to the end of all of your tweets... let's get it trending!
If you would like to make a donation to the charity via Mascarathon you can do so here.
Let me know if you take part, or even if you just go to watch... I'd love to see your photos!