Spears topped Yahoo's search ranking for the second year, representing the sixth time in seven years that the troubled singer has held the top spot.
Yahoo's 2007 annual search report dropped a single top 10 list in favour of categorised rankings including topics such as sports, news, technology and celebrity gossip.
The global environment was also a hot search topic in 2007. Yahoo reported 'recycling', 'global warming' and 'freecycle' as its most popular green searches.
Popular culture dominated the top overall searches, but Yahoo stressed that these topics are not necessarily those to which surfers pay the most attention.
"Remember that we search because we want more information about something that we do not get from our regular sources."
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