"So Much To Say, So Much To Give" from Chicago II (or "Tanto para decir, tanto para dar" as it is titled on my copy) has a rad example of how the 3 main vocalists work so well together, with Robert Lamm's lead lines punctuated by Cetera and Kath adding harmonized "FREEEE TOO!!" and "PEO-PLE!"
― Prefecture, Sunday, 24 March 2019 15:27 (five years ago) link