jacksonpotter said: "Curious as to how high Evan goes in WTAW, I've seen Bb5 and Bb4? Bb5 seems awfully high for a tenor, and highly doubt that any male tenor could belt up to the Bb5, which makes me wonder whether the finally "big note" in WTAW is in fact the Bb4. Anyone know?"
Yes, the top note of Waving Through a Window is B-flat4. Some schools of thought consider C5 to be middle C, which would then make it B-flat5, but MOST people consider C4 to be middle C.