The Guitar which most of you are referring to is not a guitar its a Baritone Ukulele.
English speakers often call the instrument the "uke" (yook) or "ukulele" (yoo-koo ley-lee), whereas given the instrument's Hawaiian origin, it might be more accurate to say the "uku" (oo koo), or "ukulele" (oo koo lay lay). In Hawaiian apparently, all syllables end with a vowel and `e` is always pronounced as a long `a`. The conventions of transliteration from Hawaiian probably allow both spellings: ukulele and ukelele. The Ukulele Orchestra of Great Britain use the former spelling but they don`t speak Hawaiian. (Extract from the UOBG website)
It is all tongue and cheek, their repertoire ranges from George Formby covers to the Sex Pistols!!!