Justin Bieber

jb models note scales are might C3-C4 and falsetto E5 its good to C2-G3 if you convert a female singer's audio its good to down the key -3~-8 and bieber's voice is lower then other singers so sometimes its good in -12 too and key higher maybe not good if you key higher i prefer 5key more higher might not good

sample its not clear vocal but its converted good