So, in Dave we got a sense that Hurley could have been hallucinating everything or they at least wanted us to suspect that. I thought it interesting that when Hurley was buying his shih tsu shirt they had The Dream Police playing in the background. I guess this could have been alluding to Ana Lucia or could Hurley really be hallucinating something.
They're driving him insane, those men inside his brain.

I think a lot of shows especially lost put in a lot of songs on purpose and this would be a good example. Well spotted. The lyrics are appropriate.