Not often acknowledged, but Wish of the Princess, a heartwarming piece where Peach prays from the bottom of her heart and gives the Star Spirits power.
Fire Up The Cannon. Plays when you get fired out of a huge-ass cannon TO THE MOON. After going through a long and tedious Chain of Deals quest to get the Cannon operating, the music makes everything totally worth it.
Lineland Road. Very interesting pick of classic Mario tunes.
And, on the same vein, The Open Plane. Retro never sounded so good.
Gloam Valley. This song is the first one you hear in Chapter 2, coming directly after you've beaten Chapter 1 and figured out the pattern of how this game is going to go. So in a way, the song is this SPM's way of saying "Okay. So you've learned the basics, so now it's time to start the quest for real. You ready? Good. Let's kick this game off."
Soft Light provides a level of epicness you just don't expect from Mario.
Promise. No better music for the end of Blumiere and Timpani's story.
The fight against the Tower Power Pokey also has a very awesome tune, sounding very tense and fitting for a Desert boss.
The Gooper Blooper fight themes, a salsa dance tune that increases in intensity as he shifts his attacks. Gooper Blooper provides the claps to the beat himself in battle. If the proper Thing Sticker is used, the music will be replaced with a upbeat remix of the original Super Mario Bros. theme while Mario is given the advantage.