This paper examines the effect of the exaggeration of acoustic properties crucial to vowel intelligibility as found in singing on the mutability of vowels in lexical access. Previous research had discovered that consonants play a greater role in lexical access than vowels do, as evidenced by the relatively greater degree of vowel mutability in word reconstruction tasks and similar lexical access related tasks. The present experiment tested whether an increase in vowel intelligibility could reduce this bias for vowel mutability by utilizing the positive effects of singing on vowel intelligibility. A total of 43 participants were recruited and divided into a regular speech condition and a singing condition. Participants completed a word reconstruction task and vowel/consonant substitutions were recorded. Subsequent analysis utilizing a generalized linear mixed-effects model revealed no significant differences in consonant/vowel substitution proportions between the conditions. However, a baseline vowel mutability bias was not replicated, thereby invalidating any conclusions regarding the effect of singing on vowel mutability. Follow-up analyses revealed that the inability to replicate the baseline vowel mutability might have been caused by poor stimulus quality, likely a result of inconsistent articulation, microphone placement and speaker performance. As such, the results should be interpreted with extreme vigilance.