This is an interesting stage that requires a bit of luck, however it is not too hard to get the three star mastery. Simply launch your first bird into the wind blower, the angle doesn’t have to be exact. But you want to get under the center platform.
Power Activation Point
Shoot out your lasers with the intention to break the two green pigs to the right.
First Shot Result
Now with the metals cut from under the two floating pigs, they will start shooting out lasers and will eventually die. What you would do is to rely on your luck, that the lasers will kill the rest of the pigs so that you can walk away with the three stars for this stage.