Two Live Crew was sued by the holders of Roy Orbison's copyright for their version of "Pretty Woman." Titles are not copyrightable, so the basis for this suit was the copied first line: "Pretty woman walking down the street." (The rest of the two songs were very different.)
"Crew" had a "parody" defense for using the first line. But suppose they didn't. Could they fix the problem by e.g. changing the infringing first line to something like "Pretty woman running through the park?"