Jewelery store, Michael Hill, has launched an online promotion to find the world's best couple.

The winners get a 22 carat diamond ring. Kim Kardashian is the campaign ambassador. Couples who enter the competition will take part in a series of online challenges. The top six couples will then be adjudicated by a panel of expert judges with the winning couple being flown to Chicago to be presented with the ultimate 22 carat princess cut diamond engagement ring. Check it out here