I got it by having Luke cut the crane so the TNT fell into the junk than had Obi-Wan get the rest of the pigs that were still alive.
So about fifteen minuted after I posted that, I ended up getting three stars. I made the mistake of thinking I could only get it by using one bird, so as you can imagine, when Luke wasn't destroying everything, I would restart without giving Obi-Wan a try. I ended up getting to the point where I thought 'well this isn't going to happen so I might as well just get a higher score' and the next thing I know I get the three stars and the accomplishment for finishing all levels with three stars.
Thanks for the help anyway, I'm sure I'll need it again soon!
I have 3 stars on all levels so far
I'm fairly sure I would go insane trying to get three stars on all levels. Either that, or I would lose my job as I would be obsessed with finishing and not worry about doing anything else. I'm very jealous though Scott, that's a helluva feat!