Basically. I heard literally all the same songs that are on my Under The Sea channel on Pandora. Which suited me just fine. I had been listening to that for weeks leading up to my trips and since I've been home so I was right at home. I heard it on the island, in the elevator, in the stairway. I was a happy cruiser!
Its funny that you mention Fireworks. In the DLounge, a lil 5 yr old wanted to sing that but because they didn't have it in karaoke form, she did the song herself a capella remembering all the words and everything on her own! I have a link to that on one of these threads, may have to search for it because I'm on my phone, but it is called Why I Love Disney Cruises or something like that from about a week or so ago.