Rick Astley became the subject of a viral Internet meme in which an estimated 25 million Internet users were tricked into watching the video for Rick Astley's "Never Gonna Give You Up" by posting it under the name of other popular video titles.[7] The practice is now known as Rickrolling. The phenomenon became so popular that on April 1, 2008, YouTube pranked the Internet community by making every single video link on the front page a Rickroll.

once again, WHAT DOES THAT MEAN?!