Musical Memories...
 

How do I get the Musical Memories trophy? I've played through this chapter several times and still have yet to get this trophy. I have all the others but this one.

Which chapter? Chapter two?

If so, try using that singing manatee multiple times. I'm not sure if that'll work, but it's worth a shot.

I think he is referring to Chapter 4, in which case you have to unlock Jacques the Monkey from his cage and examine him in your inventory. Easy, huh?

Um...yeah...did that and nothing happened.

You need to get TWO singing moments, one for Examining Jacques in the Inventory (Monkey in My Pocket) and another one for using the Bathroom in Club 41 (Guybrush will whistle and briefly sing a song).

edit: You can't actually use the bathroom until a later point in the game, during the fight between Elaine and Morgan, at which point, Jacques will be long gone from your inventory, so remember to do each one asap.