Event Sticker Design

I'm in need of a sticker design for an upcoming event. The stickers will be given away at the event, so they should be eye-catching and memorable.

Key Requirements:
- Design needs to be bold and colorful to stand out
- The shape of the sticker is square

Ideal Skills:
- Graphic Design
- Brand Promotion
- Event Marketing

Experience with creating event giveaway stickers is a plus. Please provide your portfolio showcasing similar projects.