Google Zeitgeist has listed this "Zidane Headbutt Video" as the top search query on Google for the week ending July 17 though the search trend data isn't live on Google Trends yet.
No wonder, a YouTube Video is the top result on Google while Yahoo Videos is showing 84 video clips featuring Zidane Headbutt.
Other related queries are: zinedine zidane headbutt video, zidane headbutt video clip, zidane headbutt video game, zidane headbutt video download, zidane headbutt world cup video, zidane headbutt materazzi video, zidane headbutt video 2006, zidane headbutt italy video, zidane world cup final headbutt video
Zinedine Zidane also earned a three-game ban for head-butting Marco Materazzi. So the headbutt search is likely to top the Google charts for some more time to come.
Animation Credit: InsideGoogle