Nah, Chibi-Usa's song was awful and overtly syrupy. After seeing it for the first time, I skipped it for the rest of the time I watched Season III.
And the endings (along with eyecatches I've noticed) also show how the staff on Crystal don't seem to realize that there were four other members on the Sailor Team who should have been just as important in Crystal as they were in the original anime and manga (if you've noticed, while they focus on Moon, Mamoru, Chibi-Usa, Uranus and Neptune [and Pluto and Saturn in eyecatches], it's just them,
there's no Mercury, Mars, Jupiter and Venus!). If they had just acknowledged stuff like that (and made them more useful/better used in Crystal), then none of the mess of the first and second seasons probably would have happened and I wouldn't have been so angry and frustrated with it!