Sony
- Official site. Provides information on the game, and a gallery.
- http://www.us.playstation.com/content/ogs/scus-94448/site/

Anime Lyrics
- Lyrics from the album "Make it Sweet!". Most of the songs come from the game itself.
- http://www.animelyrics.com/game/umjammerlammy/

IGN - Review
- Review, by Um Jay Boor Lammy: "So if you enjoyed Parappa the Rapper, then yes, this is a must have." [Score: 8.6 out of 10]
- http://psx.ign.com/articles/160/160862p1.html

GameSpot - Review
- Review, by Jeff Gerstmann: "If you didn't play Parappa to death and love every minute of it, you might as well skip out on Um Jammer Lammy." [Score: 8.4 out of 10]
- http://www.gamespot.com/ps/puzzle/umjammerlammy/