SlimPic is a simple web tool that lets you make any person in any photo look slim.Just upload a photo from your computer or upload from Facebook, then specify how much weight you want to shed off in lbs or kgs. SlimPic will actually tweak the image and make the person look slimmer.
You can also explore some public pics where celebrities have been slimmed and post comments on them or share them on Facebook. If you register for a free account, you can also manage all the photos you slim and post them on Facebook.
Similar tools: WeightMirror, In20Years, Taaz Makeup, Citrify, uStyle, LiftMagic