It has been stuck in my head for the longest time.
If you're talking about the one that starts out the first movie, it Hoist The Colors.
The theme song is called: He's a Pirate
it is either hoist the colours or Jack Sparrow theme song Hoist the colours, is like the king and his men stole the queen from her bed and bound her to her bones the seas be ours and by the powers where we will will roam yo ho haul together hoist the colors high Heave ho thieves and beggars never say we die. and the Jack Sparrow one doesn't have any words but it is fast paced and has a definite catchy tune.
