Now can we walk?
Now can we run?
Now can we stay all day in the sun?
Yes, it was me
Please let me be
Part of your world

The emotional finale caps off the movie with an uplifting chorus reprise of the movie's main theme, "Part of Your World".
Now we can walk
Now we can run
Now we stay all day in the sun
Just you and me
And I can be
Part of your world
A much earlier draft of the finale, as featured in "Music Behind the Magic" has different lyrics that match the more melancholy style of the earlier drafts of "Part of Your World".
Now can we walk?
Now can we run?
Now can we stay all day in the sun?
Yes, it was me
Please let me be
Part of your world
The Broadway workshop has an extended version of the finale sequence that is a fusion of "If Only" and "Part of Your World". The early portion of the song is sung by Ariel ready to say goodbye to Eric, before Triton surprises her by transforming her back into a human, and although I understand why they cut it for the final version of the musical, I quite like this verse.
Ariel:
If only I could speak
If just to say goodbye
If only I could somehow find
The strength at least to try
I'd reach into my heart
As deep as I could go
And oh, what you would hear
If only I could
Ariel & Eric:
Now we can walk
Now we can run
Now we can play all day in the sun
Eric:
Just you and me
Ariel:
And I will be
Both:
Part of your world
The Broadway's triumphant, joyous finale expands on the finale of the film, using music from "Part of Your World" and "Fathoms Below".
Chorus:
And now at last
Love has surpassed
Each tribulation
Mermaid and man
Finally can
Join and be one
Now they can smile
Walk in the aisle
Here at their
Wedding celebration
Eric:
Sailing forward
Ariel:
Standing steady
Ariel & Eric:
Starting life completely ready
Chorus:
And now can be who they're meant to be
Now they can gaze on a new horizon
Here between ocean and sky
Forever and on
Now they can walk
Now they can run
Now they can stay all day in the sun
Eric:
Just you me
Ariel:
And I will be
All:
Part of your world