Google provides data from Google Insights for Search. Google trending only provide the least of seven days. But certainly this trends change everyday.
Facebook and twitter trends are almost the same because both are social network website.
Yahoo trending like twitter and facebook provides data what is trending for that particular day.
From now on, I will post the trending here. So keep coming back to be informed.
Without further adieu; the trend for today ( February 14, 2012) are the following;