I just went over the music files in Nancy Drew: Legend of the Crystal Skull, and it's pretty amazing.
I mean, in the actual game itself, I think there are only about two songs. It turns out they recorded a lot more music than just that. Many of the songs are upbeat, jazzy New Orleans-style music, with a lot of horns. I guess they had to cut those songs out of the game, because the game is too dark and scary to have upbeat songs.
So here are some songs you probably missed while playing the game:
A Bayou song, that features accordions, banjos and a techno beat.
The original background music for Zeke's Curio Shop:
A jazzy jangle:
A Hawaiian luau song?