Here is a great example from Natan Jewelry Shop (Sao Paulo, Brazil) of guerrilla marketing. The company did a great job using promotional stickers or decals in order to show their female target market how beautiful the jewelry would look on them.
The full wrap design of this bottle label sparks interest at first sight. The design draws in the consumer's attention with interest in learning more about the label itself. The label works well in creating a playful atmosphere.