Call me sad if you like, but I've been modding song lyrics to have more CompSci-related (geeky, if you like) meanings.

Legal

IANAL, but my reading of copyright law leads me to believe that these count as non-commercial parodies of copyright works and so come under "fair use". If you are a lawyer and believe differently, please let me know. AFAIC, such elements as I can claim copyright on I place in public domain, but if you wish to use the above works for anything the original authors might object to I would recommend you contact them yourself.