Rick astley is a Britain pop and eurobeat singer born in February 6, 1966. He is famous in the UK. He became famous worldwide ever since enormous YouTube users uploaded music videos of one of Rick Astley's hit single 'Never Gonna Give You Up'. This video is often used as a prank of redirecting useful resources into 'Never Gonna Give You Up'. This is often referred as Rick Rolling. Rick Rolling is also popular during the April Fool's day.
Copy and paste to get Rick Rolled (often referred as 'click here to get Rick Roll'd'): http://www.youtube.com/watch?v=Yu_moia-oVI