Adlib

[Britney]

Adding additional layers of vocal inflections over the existing main vocals in order to enhance the vocal effect of the song and also to add more variation and excitement to the vocal performance. When done properly a song can go from a grade of a mere C to an A ...........

[Rihanna]

Vocal effects in music used and overdone by the likes of Lil Jon and [Young Jeezy].

[Dorothey Allen]

Without previous preparation.