The word Falsetos is misspelled against Falsettos, which is plural of "Falsetto"
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Falsettos has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings FALSE & os which should not be misspelled with single 'T'
Wrong Spelling:  FALSE-t-os 
Correct Spelling:  FALSE-tt-os 
Find more incorrect spellings of Falsettos to spell right way.