For Beat the clock levels, always choose "POPPY"cause if you use her correctly she clears out several of the rows at a time...
Comment found on Can't get past Angry Birds Stella POP! Level 373?
Question: How did you three star level 52? I have been playing it for three days. I have beat the clock by 41 seconds and still didnt three star! Very frustrating!
Comment found on Angry Birds Stella POP! Level 52 walkthrough