Best song ever? Best song ever.
Definitely best song ever.

Lyrics:

[Chrysalis]
This day is going to be perfect
The kind of day of which I dreamed since I was small
Everypony will gather round
Say I look lovely in my gown
What they don't know is that I have fooled them all!

[Cadence]
This day was going to be perfect
The kind of day of which I dreamed since I was small
But instead of having cake
With all my friends to celebrate
My wedding bells they may not ring for me at all

[Chrysalis]
I could care less about the dress
I won't partake in any cake
Vows, well I'll be lying when I say
That through any kind of weather
I'll want us to be together
The truth is I don't care for him at all

No, I do not love the groom
In my heart there is no room
But I still want him to be all mine!

[Cadence]
We must escape before it's too late
Find a way to save the day
Hope, I'll be lying if I say
I don't fear that I may lose him
To one who wants to use him
Not care for love and cherish him each day

For I oh-so love the groom
All my thoughts he does consume
Oh Shining Armor, I'll be there very soon.

[Chrysalis]
Finally the moment has arrived
For me to be one lucky bride

[Cadence]
Oh, the wedding we won't make
He'll end up marrying a fake
Shining Armor will be-

[Chrysalis]
Mine, all mine! {evil laughter}

...Absolutely definitely best song ever.

FiM belongs to Hasbro and the Hub, 'This Day Aria' written by Daniel Ingram.