Last night I learned of a new hilarious TV show aired in Russia, "Toch-v-Toch", where their famous singers are judged on how close they can mimic a performance to the real thing. Somehow, I'm not surprised this exists there!
Here is one of the best examples I've found. Russian pop-star, Maksim Galkin, performing "Du Hast" as Till Lindemann of Rammstein! Look at that transformation!