Re: http://knowyourmeme.com/memes/rickroll
Know Your Meme scientist Jamie Dubs brings Rickrolling, a bait-and-switch practice that involves providing a web link supposedly relevant to the topic at hand, but actually re-directs the viewer to Rick Astley's 1987 hit single "Never Gonna Give You Up."
Context: http://knowyourmeme.com/memes/bait-and-switch-videos