Scene It? Bright Lights! Big Screen!

Use four controllers. Set the game to 'Party Play' and start the game with four players. You won't need four profiles, just the main one you need the achievement on. Play five rounds, making sure the main profile always ends up with more points at the end of each round. Simple technique is give the same answer with all four controllers, with the main one answering first to assure more points.

At the end of the 5th round, the achievement pops. Should take 10-15 minutes max.