Just read the first two clues and was the first thing that popped into my head. The third clue is useless as I don't know what you consider awesome music, while I think it's cool.
1. A land far away 2. Pretty colorful. 3. Seven Unite into one.
Your thinking too literal! The land has sort of rainbow feel from a far but when on it you won't really notice it. Also I know stars are well known for wishes but keep in mind they aren't the only ones that have that ability.
1. A land far away 2. Pretty colorful. 3. Seven Unite into one. 4. Land of wishes 5. An interesting park is found here. 6. Bowser attempt to take over this area.
It not the Mushroom Kingdom. The land has thing for colors as you progress. 7 rulers of one Kingdom. Fairies are also known for granting wishes. Bowser's theme park is found here. and Bowser did try to take over.