I don’t see a thread that is obviously about this already, so:
http://www.preppygrams.com/rickrolled.html
(the singer explains the incident here:
http://corner.nationalreview.com/post/?q=ZmZkYWY0NWZmYmUyYmM2MDZjMjljMjdiNGM3MjUwNjI=)
(and yes, Mr. Derbyshire wrote a followup a little while later saying “stop the emails please, I know I misspelled it”)