How do you get all the stars in Super Mario Galaxy?

Answer:
If you beat every mission, it will give you all the stars, of course.
Remember, after you get all 120 stars as Mario, you unlock Luigi. After getting all 120 stars as Luigi, you unlock a bonus star for Mario and Luigi, giving you a grand total of 242 stars to shoot for!
First answer by Homestar43. Last edit by Cheezonpeaz41. Contributor trust: 63 [recommend contributor recommended]. Question popularity: 1 [recommend question].