The Yellow Lemon Project is one of those very interesting projects where an artist creates a certain theme and pretty much apply it to any character and brand and instantly create amazing art. This artist is called Sakiroo Choi, his amazing art skills combined with his interesting lemon headed characters are very interesting. From one point, they are quite scary, they have a look on their faces that only means you will be eaten soon. I love this his vibrant colors and great detail.
As for his process, he sketches with a pencil, outlines with a marker then color on photoshop and you can get see a detailed walkthrough on the video below.
You may also keep up with newer images and follow the ongoing project on its facebook page.