The Similou were an electronic music duo from Gothenburg, Sweden, comprising Dizzy Crane (Joel Eriksson) and Jesse Nectar (Erik Niklasson).
On 16 July 2006, YTMND user Salta created a site called "Rainbow Stalin;" which comes from a misinterpretation of the words "rainbow stylin'" in The Similou's song to be about Joseph Stalin.
This site featured an edited Soviet propaganda picture to which Salta added a rainbow and gave Stalin cartoon-like eyes.
Many of the sites have Soviet propaganda art edited with flashing colors and accessories such as sunglasses, headphones, and turntables to portray Stalin as a jubilant DJ.
While the meme comes from YTMND, references can be found on other websites such as YouTube.