This was probably not the way to go about it for many reasons. Pre-selecting the song list only invites harsh criticism. Musical tastes vary too greatly to get a majority of the fans behind this sort of selection process. Chelsea Dagger is regarded as the top celebration song, yet the Chicago fans rejected it at first. That is what is going to happen here. Any song is going to be rejected at first, regardless of how good or bad a choice it may be.
If fan input was necessary, then just have an email address where they can submit their suggestions. Then you need to trust someone enough to comb through those suggestions and pursue every other avenue to select one that meets all the predefined criteria. Then you cross your fingers that the person you trusted to get it right - got it right.