Misspelling 'Britny Spears'
It seems that guys on Google did part of the job of detecting common mispellings in a purely statistical way: Britney Spears spelling correction: "britny spears"
By the way, I found the page by checking the correct spelling of 'misspellings'. Something I usually do when in doubt for common words. For not so common words, you better rely on Merriam-Webster or equivalent.