Sorry, I don't understand why this is such a concern when the winners have already been chosen for this contest and the entry in question was not chosen as a winner. This was a one-time deal style contest aligned with the Valentine's Day holiday. While there will be other types of contests and giveaways on social media in the future, it's likely they won't be handled in the same fashion because I like to keep things fresh
Now.. to answer the question, we didn't specify any rules preventing players from making a WoWs themed parody of another song, poem, work-of-art etc. So sure, you could even submit "Row, row row, your boat" if you wanted to, but the likelihood of it being selected as a winner would probably be slim-to-none because we choose winners based on originality and creativity.