Blowuppize your photo will be a facebook app.
Users will choose a photo from facebook or upload it and apply stickers to the photo.
They will be able to choose stickers from a lateral menu and paste it on the photo. They will be able to scale, move, rotate and flip stickers (png pictures given by our graphic) directly on the photo.
When done users will be able to download or post the edited picture on their wall.
Lazergram is a similar app.