I watched every single video in this guy's YouTube channel of his cockatiel singing themes from various video games, and can't figure out if it's a miracle or a hoax. I have never kept a cockatiel as a pet, but have kept other exotic birds, and I have a hard time buying that it's not faked. But either way, I enjoyed.
Cockatiel sings Theme of Chocobo (Final Fantasy)
(blackwhite810, thanks Joe Sabia)
Update: Most commenters thinks it's real. I am a jaded internetter, but okay, I'll go with the popular vote. Cockatiels are amazing and life is a miracle!