when i don't know a song name, heres what i do: remember as many lyrics as you can or at least a full line, and make sure you remember the wording exactly as it is. then type it into google using quotation marks around your line (quotes means that google will only show the sites that have your keywords exactly as they appear in the quote you gave them, in that exact order)

make sure to add the word "lyrics" outside of the quotes to narrow the search a bit and so that a bunch of myspaces dont show up