I didn't use any of the vocals from PinkiePieSwear's original song. I cut them up myself using an acapella version of "So Many Wonders" sung by Fluttershy. Here's the lyrics below, which make little sense.
[ Verse 1 ]
Eeeeeeeee, Ah-ah-ah,
That at am,
Tin what pell wonder,
Tin what pell wonder,
Filled with so m,
Filled with so m,
Am that won,
Tin what pell wonder,
Tin what pell wonder,
( repeat )
[ Verse 2 ]
Am what th-thi-is filled,
Uh-uh that th-thi-is filled,
Tin what pell wonder,
Tin what pell wonder,
Filled with so m th-thi-is filled,
Uh-uh that th-thi-is filled,
Tin what pell wonder,
Tin what pell wonder,
( repeat )
[ Break ]
What di di, di di,
What di di, di di wonder,
( repeat )
[ Verse 3 ]
Ooooooh, eee eee,
Uh-uh that at am,
Tin what pell wonder,
Tin what pell wonder,
Filled with so m (uh-uh-uh),
Filled with so m,
Am that won,
Tin what pell wonder,
Tin tin what pell wonder,
[ Verse 3 variation ]
Ooooooh, eee eee,
Uh-uh that at am,
Tin what pell wonder,
Tin what pell wonder,
Filled with so m (uh-uh-uh),
Filled with so m,
(Filled) Am (uh) that won,
Tin what pell wonder,
Tin tin what pell wonder,
"So Many Wonders" lyrics and what was used:
What is this place, ("what", "thi" and "is" are used)
filled with so many wonders? ("filled", "with" "so m", "won" are used)
Casting its spell, ("tin" and "pell" are used)
That I am now under, ("that", "I", "am", "w un" are used)
Squirrels in the trees,
and the cute little bunnies,
Birds flying free,
and bees with their honey, ("ey" is used)
Hooooonneeeeeeey! ("eeeeeeey" is used)
Oooh, what a magical place, ("oooh" is used)
and I owe it all to the Pegasus race,
If I knew the ground had so much up its sleeve,
I'd have come here sooner, and never leave,
Yes, I love ev-er-ythiiiiing! ("iiiii" is used)
Some samples I don't quite remember where I got them, but they're all in "So Many Wonders".
Any place that claims they have the lyrics for "Flutterwonder" are usually incorrect.