Question: What is the full name of the singer and songwriter who, along with Missy Elliott, had uncredited vocals on the "Young, Fly and Flashy, Vol. 1" album version of the song "Gotta Getcha"?
Sentence (from "Gotta Getcha"): The album version features vocals by Johntá Austin, and uncredited vocals from Janet Jackson and Missy Elliott, who helped write the song alongside Dupri.
Relevant evidence: Yes