A playing at a private estate was hardly unordinary for Octavia, despite how early in her career she still was. The murder of a groom to be right after their engagement? Less so.
Song and magic are two parts of the same whole in Equestria. When Rose saw Anon, it was love at first sight, and as if to shake any doubt, she heard their song. It was the happiest moment of her life. Until she realized he couldn't hear it.
Alone on Valentine's Day, Sunset is refusing to admit to herself she's upset about her relationship status. Trixie is a bit more bitter about her own lack of a relationship.
Lyra thinks Discord is an idiot for not thinking to dodge when the Elements of Harmony were about to strike him. Discord thinks this is the perfect opportunity for a game.
If Ponyville's new repair-pony gets his way, the Mane Six won't even know he exists - and nopony in Ponyville will miss him for long once he's returned to Earth.