Our strategy for Angry Birds Birdday Party (Birthday Party) level 19-15 is to loft the Pink bird to land atop the pebbles and TNT in the center of the level. One way or another, the right side of the level should be cleared. Use an elongated version of the Reverse Remi Shot, sending the Boomerang bird backwards and down, spinning it through the bottom-left corner of the structure. The TNT cake will cause the towers to implode, and while destruction may vary, you should have enough points for 3 stars. The score in the video below is 105,900.