Calling all beauty junkies! We’ve *just* launched a campaign to find out which Cult Beauty product stole your heart in 2017. Whether it's the brow pencil you buy in bulk, or the cleanser you will. not. live without, share your cosmetic obsession (and you could win a little something to fuel your addiction).

Here's what you have to do:

1. Take a picture of your favourite Cult Beauty product of 2017, and post it to {Instagram} using #CultProductoftheYear (that's 'Cult Product of the Year' - for those (like me) who can't read words sans spaces).

2. Tell us in the caption why it's made the grade. What makes it the ultimate 'HG' have-to-have?

3. Make sure you tag us (@cultbeauty) so it's easy for your fellow cosmetic-obsessives to see what's 'trending' (we're anticipating lots of shadow palettes and a hefty dose of Pixi's Glow Tonic)

4. Every day, we'll choose our favourite image (we'll be announcing each day's winner on our story), and the lucky entrant will receive £100 to spend on their Cult wishlist!

If that doesn't tempt you to take part, we're not sure what will. You've got to be in it to win it, so let's get this party started...

Need inspiration? See what your fellow obsessives are loving right {here}!