To the sky is a song about Scootaloo begging Rainbow Dash for one more flight through the clouds before she heads off to run the Wonderbolts in place of Spitfire.

Art source - https://www.deviantart.com/tttimon/art/You-ll-be-my-sister-494072736

Lyrics;

Hello? Are you still there?
I’ve been looking for you everywhere.
There is something I’ve been meaning to say.
What can I do that will make you stay?

Please
I don’t want you to go
There’s so much more that I need to know.
Before you fly up to the clouds up high
Will you take me with you to the sky

Please
Will you give me one last chance?
One last look over the long distance
Before you fly up to the clouds so high
Will you take me with you to the sky

Please
I don’t want you to go
There’s so much more that I need to know.
Before you fly up to the clouds up high
Will you take me with you to the sky

Thank you
For every single thing you’ve ever done
Won’t you
At least stay here until the sun is gone.
Please stay
I wouldn’t be me without all you’ve done

Please
I don’t want you to go
There’s so much more that I need to know.
Before you fly up to the clouds up high
Will you take me with you to the sky