In 2010, the `Promise This` hitmaker was the most popular celebrity and music star as well as the fifth most popular search term in total on Yahoo!.
She is four places up on last year, and beats Katie Price into second place. Her divorce from her husband Ashley Cole - who allegedly had multiple affairs - came top of the list of mostsearched celebrity scandals.
Other showbiz personalities to make the list included Lady Gaga, who went up to third from six last year and Angelina Jolie and Victoria Beckham, both new entries.
Megan Fox was up from tenth last year to seventh spot, while Justin Bieber and Katy Perry also made the top 10 mostsearched for celebrities.
Other popular scandals included Mel Gibson`s alleged domestic violence against his ex-girlfriend Oksana Grigorieva and George Michael`s prison stay.