Rarity: For me? Dearest Rarity, your presence is requested at the Canterlot garden party tomorrow afternoon. Yours, Jet Set and Upper Crust! The Canterlot garden party! Why, next to the Galloping Gala that is the premier event in Canterlot! Oh, but if I go, I'll miss Twilight's birthday... But if I don't go, my new reputation in Canterlot as a Very Important Pony might be ruined! I might never be invited to another high society event again! Friend's birthday... Very Important Pony... It's just too important. My dear Twilight, I am afraid I won't be able to make it to your birthday party tomorrow, because... because poor Opal is quite ill, and she is in no condition to make the long journey back to Ponyville! I do hope you understand. Your friend, Rarity.