And now I'm glad I have an iTunes account.
I must say Cheerilee and Big Macintosh becoming lovey dovey under the spell is hilarious (Peter New must've had a blast reading Big Mac's lines).
This is definitely a CMC-centered episode. None of the main characters appear at all except Twilight, and it was only in one scene in the second act (she gave the love potion book to the girls). And thus Applejack's streak of appearing in every season 2 episode ends, her thunder taken by her siblings oddly enough.
(And I just noticed. During the song sequence Sweetie Belle said that one elderly stallion she sees is too old for Cheerilee. The said stallion was giving eulogy at a funeral.)