There are a few ways that people commonly spell the word beautiful incorrectly. The most common way is to spell it beatiful. This is likely because the correct spelling has an unusual letter pattern, with two consecutive vowels followed by two consonants. Another common misspelling is beutiful. This may be due to the fact that the word looks like it should be spelled with an -ing ending, or because people confuse the spelling with that of the word bootyful.