Social networks Bebo and MySpace were the two most searched for terms of 2006 using Google's search engine.
The two rival sites allow users to create individual web pages, with photos, music and video.
The football World Cup was the third most searched for term while Paris Hilton topped the news searches.
The top 10 searches were dominated by web 2.0 developments, such as video site Metacafe, music streaming service Radioblog and encyclopaedia Wikipedia.
The word video was the seventh most searched for term of 2006, reflecting the growth in services such as YouTube and MetaCafe, and offerings from Google, Yahoo and MSN.