Twilight has worked herself clear to the point of exhaustion in order to set up The Grand Equestrian Summit in Canterlot. After she collapses, Spike is tasked by Cadence with the essential mission of making sure Twilight isn't disturbed while she catches up on the sleep she's missed.

When a herd of ponies come knocking at Twilight's door though, it falls to Spike to deal with them.

So, naturally, he does the smart thing and solves everything.

Equestria and Yakyakistan are friends for a thousand moons thanks to the ingenious efforts of Pinkie Pie. However, Twilight still feels guilty about letting everything get out of control like she did. During the party, she approaches Princess Celestia and Prince Rutherford to issue her heartfelt apology in private. But as she soon discovers, she's not the only one who needs to brush up on her diplomacy.

My mini-epilouge to the episode Party Pooped.