pedanther

You are correct about #16 and #26, and also in the implication that there's no more Les Mis to be identified. It's the 10th Anniversary Concert recording with Colm Wilkinson as Valjean and Judy Kuhn as Cosette.

#4 is indeed "Ain't Misbehaving", in a recording by the cabaret trio Combo Fiasco.

You're also correct that #12 isn't "Catch a Falling Star" (and I venture to suggest that the song as a whole isn't all that similar in sentiment, though of course I can't prove it without revealing what the song is).