Suzy Q was a studio project of the Cucuzzella brothers and they used at least three vocalists for this project.

Firstly Carol Jiani did the vocals for the original version of Get On Up Do It Again, and
on Nov 2nd 2006, Carol Jiani confirmed herself on a discomusic.com forum that she did the vocals of Suzy Q’s Get On Up And Do It Again and never got credited.

Then Michelle Mills was the voice of Suzy Q for about a year during 1981, recording the Get On Up And Do It Again album, and whose image is used on the picture covers of the a number of 12 releases. This was confirmed by Michelle Mills in a discomusic.com forum on 30th March 2011

Between 1985 and 1987 the vocalist was Angie Vileno.