Let me be myself - Eduardo Kobra
I was so amazed by this graffiti that I needed to search for more of Eduadro Kobra's works. His style in his works is colourful as you said and has this mosaic like feature. It is impressing how he uses well-known persons to make his art to recall how we have to act now that past horrifying events won't happen again and how we need to do right things to make world better for everyone.