What happens when you get 120 stars in super Mario galaxy 2

2 or 3 green stars appear on every galaxy. ( but you need to have beaten the last Bowser again after you get 120 stars ) also when you get 240 stars a new galaxy appears, Grandmaster galaxy!!! To get the daredevil run on Grandmaster galaxy you need to have given 9999 stat bits to the banktoad, have 241 stars and have all the comet coins!!! ( comet medals )