One of the funniest edited lyrics are the Rolling Stone's "Brown Sugar" as seen in the Kahlua commercial for their "mudslides". They have the line:

Brown sugar how come you taste so good?

but omit the second lines of this chorus:

Brown sugar just like a young girl should
and
Just like a...just like a black girl should

The entire song is about slavery, and people having sex with their slaves. Hardly the best corporate image for the Kahlua people to project!