1. If I had passed the test, I would have gotten a new computer.
2. If I had passed the test, I would have got a new computer.
-------------
Which one is right? Are both OK?
3. If you became a movie star, who would you be?
4. If you became a movie star, who would you become?
5. If you became a movie star, who would you want to be?
6. If you became a movie star, who would you want to become?
(Which ones are grammatical? Can we use all the four expressions? Which ones are commonly used? Thank you.)
#1 is correct.
The principal parts of "to get" are get, got, gotten.
#s 3-6 are all correct and are interchangeable! Nice!