I Walk Away

 is a song in Phineas and Ferb The Movie: Across the 2nd Dimension sung by Olivia Olson. It plays when Perry turns himself in so that 2nd Dimension Dr. Doofenshmirtz won't hurt Phineas and Ferb.

Lyrics
I walk away

From you my friend

I hope that this

Is not the end

Of all the times we figured out

How to seize the day

And I walk away

Background Information

 * When it was raining and when Perry bow do his face it was the same when Perry walk's away because Heinz Doofenshmirtz had a new nemesis.
 * This is the 2nd shortest song Olivia has sung, with the shortest being "I'm Lindana and I Wanna Have Fun!" in its "Flop Starz" version.