That is the question asked by Kisstagram. Launched today, Kisstagram is Hot or Not for the Instagram generation.
Kisstagram is like a game. An addictive game, with a fruit-machine feel to it.
To join Kisstagram is easy and simple, you just have to add the "#kisstagram" tag when uploading a photo to Instagram, and it will show up on the website within 5 minutes, ready to be "kissed".
Here are a few images of what it looks like:
Kisstagram has a leaderboard system too which calculates a percentage kissed of the total shows and ranks all the photos. Each image displays randomly against another.
Here is an image of our leaderboard:

Site creator Pedro Duarte says "Kisstagram is not about just choosing the best looking person but choosing the one you'd like to kiss. So you have to guess the persons personality and not just how they look."
Site developer Ollie Harridge says "The algorithm is simple so that anyone can understand how the votes work. It also means that new photos are more likely to appear at the top of the leaderboard so that it stays fresh and exciting."
Have a look at the Kisstagram in action, and enjoy the game!
http://kisstagram.com