* EarWorm: The Final Frontier, by Paul Reiser & Don Was. Originally performed by [[http://www.youtube.com/watch?v=OvBZ4KjfSWE Andrew Gold]], redone for the final two seasons by [[http://www.youtube.com/watch?v=YaIKpzsBVgE Anita Baker]]
* EnsembleDarkhorse: Murray the dog, as noted above. It says something that Academy Award winning actress Helen Hunt was frequently outperformed by a dog.