Hello!  You meant a Selfie Challenge, right?

A Selfie Challenge is a competition for the best selfie of the week. Each user can upload only one selfie for each Selfie Challenge. Upon doing that, a user can give 1 “like” to an unlimited number of selfies including their own. The selfies are ranked on the tower according to the number of likes it gets. The more likes your selfie gets, the higher your place in the tower. Each “like” gives 1 Coin, which is the in-game currency unit. The Users that collect the most “likes” at the end of the challenge will receive additional Coins as a reward. People can vote to choose the weekly topic