Formerly
C3PO: "In its belly, you will find a new definition of pain and suffering, as you are slowly digested over the course of a thousand years."

Presently
C3PO: "In its belly, you will find a new definition of pain and suffering, as you are slowly digested over a thousand years."

Sometimes it's the Mandala Effect. There's one where it's the Obama Effect though.

Man in the Mirror has also changed:

Formerly
"I'm looking/staring at the man in the mirror
I'm asking him to change his ways"

Presently
"I'm starting with the man in the mirror
I'm asking him to change his ways"

And that song from 2003's Freaky Friday

Formerly
"Don't want to grow up, just want to get out"

Presently
"Don't want to grow up. I want to get out"

Supercalifragilisticexpialidocious also:

Formerly
"One day I said it to me girl
And now me girl's my wife!"

Presently
"One night I said it to me girl
And now me girl's my wife!"

Bubbly had a minor adjustment:

Formerly
"When you kiss my nose, the feeling grows"

Presently
"When you kiss my nose, the feeling shows"

Quite a few lyrics have been changing. You might recognize this one:

Formerly
"If you like it then you better put a ring on it"

Presently
"If you like it then you shoulda put a ring on it"

This one led to a lot of discussion on reddit:

Formerly
Auto Immune Deficiency Syndrome
OR
Advanced Immunodeficiency Syndrome

Presently
Acquired Immunodeficiency Syndrome