The achievement is located in the Paris mission. At the beginning go forward to the left side and jump over the fence in the garden. Distract a crew member with the flood lights generator and subdue him, disguise yourself as a crew member and go inside where the models are prepared for the show.
Here you will find Sebastian Sato in front of a Diorama. Pick up the coin and insert the coin on the back side of the Diorama. Now hide yourself near the dump on the right side and wait for Sato. Subdue him and put his body into the dump. Go upstairs to the second floor and subdue the waiter in the large room and disguise yourself as waiter. Put your weapon on the ground and go in the direction of the third floor staircase. Here you will get frisked but we have no weapons so everything is fine.
In the third floor turn immediately left (closed door) and go to the crowbar location, jump out of the window by the vacuum cleaner and climb up the light rig.
So here is the random part, the Show ends sometimes after 2 minutes but sometimes you wait 10-15 or 20 Minutes until Viktor Novikov comes on the stage. I tested this over 10 hours and found no trigger, so the only thing you can do is wait.