It's the first for a beauty brand to collaborate with a social media platform. YSL says:
"A vibrant declaration of love, a tribute to all fans, the 1st exclusive entirely digital product imagined for those who show addiction to the brand: An eye palette called Devoted to Fans"
Available 19th July
Only 1,650 palettes available, hurry and to the Facebook page here
What's next? Maybe a Twitter nail polish by Chanel?