First I thought it was weird since I have not ordered anything recently.
Turns out it was a Super Lustrous lipstick sent from Revlon enclosed with a small card saying "Use this product to complete your next Expression Experiment Challenge.".
I did participated in the Revlon look challenge a few times before, but I have no idea how they found out where to send it.
(I guess I have disclosed my address while I was using the FaceBook app. I don't have much complaint since it is a lipstick not a bomb sent to me.)
Revlon Super Lustrous Lipstick Red Lacquer