Those misheard titles/lyrics are called "mondegreens". To see why, and read more about them, see
http://www.rulefortytwo.com/mondegreens.htm or
http://phrases.shu.ac.uk/meanings/mondegreen.html for examples.
There's the ever popular "Scuze me while I kiss this guy", "Jose can you see?" and "The girl with colitis goes by."