5-20 2 Birds
Loop first blue bird at fairly high trajectory splitting soon after releasing from slingshot (generally around cloud level or a little higher). Try to get each mini-bird to hit ice between bridges.
Loop second blue bird in a very similar way, if first trajectory was successful. Hope for favorable collapse.
(Using a third blue bird can also generate a fairly high, score but two is probably preferable)
Some High Score Targets:
3 Stars: 97,000
*Top 150: 105,710
*Top 100: 107,580
*Top 10: 116,720
*Top scores in Massachusetts in March, 2011 according to Crystal (a former feature of the Mobile App).