Some of you may have heard of "rickrolling" and some of you haven't a clue what I am talking about.
Here is a definition (wikipeda): typically involving the music video for the 1987 Rick Astley song "Never Gonna Give You Up"... is a bait and switch: a person provides a Web link that he or she claims is relevant to the topic at hand, but the link actually takes the user to the Astley video. The URL can be masked or obfuscated in some manner so that the user cannot determine the true source of the link without clicking. When a person clicks on the link and is led to the web page, he or she is said to have been "Rickrolled" (also spelled Rickroll'd).
This first happened in May 2007 and has increased in popularity leading to one of the best rickrolls ever. At this year's Macy's Day Parade a float, the song was interrupted and Rick Astley himself came out and sang "Never Gonna Give You Up." Here is the LINK.