I guess I don't have to tell you who the winner is. It's toadster101, for guessing 10 out of 11 musics correctly in Mix 1. johnny came close, guessing 4 musics in Mix 1 correctly and 1 correct in Mix 3.
Anyway, here are the answers to the mixes.
Mix 1 Kirby's Air Ride Sky Sands, Air Ride Beginner's Room(alternate track for Beanstalk Park) Float Islands(alternate track for Water, Top Ride) Sky, Top Ride Title music before you start an event in City Trial What's in the Box?(all boxes contain the same item, City Trial)
Kirby 64 Aqua Star Pop Star, level 2 Ripple Star Staff Credits
Mix 2 Kirby: Nightmare in Dream Land Yogurt Yard Ice Cream Island Grape Garden, the flying ship stage Kirby and the Amazing Mirror Intro stage(before you get into the main hub) Peppermint Palace Candy Constellation Dark Mind, final form
Kirby Canvas Curse Silver Submarine Dreamy Darkness Spectacle Space(these are all stage names)
Kirby Squeak Squad Gamble Galaxy, final stage
I used a lot of 'space' stage music in Mix 2 :P
Mix 3 Kirby Super Star Float Islands(again) Crystal and Garden area, Great Cave Offensive Dyna Blade's theme
Kirby's Dream Land 3 Rick's theme Hyper Zone(in other words, the final boss music) Level 1-1
Classic Kirby music is hard to use, they all sound nearly alike, so I didn't put too much focus on Mix 3.