This is a relatively simple stage to pull off the three star. You will have to kill all the pigs in two shots.
Launch the first bird into the bottom of the atmosphere.
Power Activation Point
Activate your power after you land. Your goal is to deal additional damage to get a little more score.
First Shot Result
After the green armor jedi pig dies, the meteors fall and set off the bombs.
Launch the final bird into the top, all you need is to get clear shots against the surviving pigs.
Second Power Activation Point
Tap your lasers to kill the pigs.
Second Shot Result
The final triple mastery star is yours once all the pigs are dead. Note that you may not have enough score so you may have to try it a couple of times.