If I had a 1950s American style fridge, like a Smeg, I'd probably probably leave it unadorned, but for those of us with more humdrum appliances, these Kudos Giant Fridge Magnets are a good way to add a bit of quirky retroness.
There are hundreds of designs available, but I particularly liked this one – Vintage Kiss, which features a 1920s lady puckering up to a monacled gent. If you are going to dress your fridge up with one of these panel magnets, you may as well fully embrace the kitschness of the concept. Other retro designs include vintage cameras and a patterned magnet in the style of vintage fabric. The Vintage Kiss magnet costs $45 (about £36) plus shipping.
Visit Kudos Magnets for more information.