Once each of the first five rounds ends, you will receive a notification announcing that the winner of each round has been released. Additionally, when you enter the app again, you will see if you hit or not the winner with your Vote. If so, you will receive 500 Stars.
Likewise, when the final round finishes and there is only one winning photo, the Hero will be announced. If you hit the Hero with your Vote, you’ll get 1,000 Stars.