who wrote age aint nothing but a number
Age Ain't Nothing but a Number All songs were written and produced by R. Kelly, except for "At Your Best (You Are Love)", written by Ernie Isley, Marvin Isley, O'Kelly Isley, Jr., Ronald Isley and Chris Jasper.
Ain't Ain't as a contraction for has not/have not first appeared in dictionaries in the 1830s, and appeared in 1819 in Niles' Weekly Register: Strike! Why I ain't got nobody here to strike....[13] Charles Dickens likewise used ain't to mean haven't in Chapter 28 of Martin Chuzzlewit (1844): "You ain't got nothing to cry for, bless you! He's righter than a trivet!"[14]