Great Idea!
One rule of thumb should be not repeating songs of the same title (ie. covers).
If I search Where is my mind from the Pixies, the next song is Placebo's cover.
If you want the MTV functionality: press 'Generate your own MTV, click here!' below the search bar, enter Pixeis, select Where is my mind and there you go! http://listandplay.com/#Search~Similar~Pixies%20%7C%20Where%...