According to the Chicago Tribune, 18,786,325 people viewed Rick Astley's "Never Gonna Give You Up"
video on YouTube on April 1st. That indicates the number of victims that were RickRolled by pranksters on April Fool's Day. Which means that in only two years, rickrolling has risen from nothing to become the most popular April Fool's Day prank, eclipsing even the classic "trick a victim into phoning the zoo"
prank. [Chicago Tribune