Pop singer and new mom Britney Spears chalked up her third title as the No. 1-most-searched term on the Internet in 2005.
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She was dethroned last year by the term "American Idol," Yahoo! said.
Coming in at No. 2 was rapper 50 Cent, followed by the Cartoon Network, Mariah Carey and rockers Green Day.
No. 6 on the "Buzz Index" was singer/actress Jessica Simpson, followed by socialite Paris Hilton, rapper Eminem, R&B singer Ciara and at No. 10, singer/actress Lindsay Lohan.
