Head to Mission 10.
In the first part of the mission, you'll be at a hotel plaza full of enemies. Clear them out, and make a left into a room with some enemies and the boss objective. Kill them and head to the rear of the room on the left to find a wooden statue/bust. Grab it. Later in the mission, after planting all the charges, head through the door and get to the checkpoint. Don't go up the stairs. Instead, head to the right to find a dead end. Plant the bust on the middle wall to open a hidden door. This leads to a lobby which leads to night club area. Go down to the dance floor and walk up to the middle of it to see an on-screen prompt to dance. Wait for your character to finish dancing before getting the trophy.
This place is also a good place to go for the following:
Thanks to VTX2004PS3 on YouTube for the video guide.