probably either:

Nellyville - Nelly
Jackpot - Chingy
The Last Temptation - Ja Rule

Anything by lil' bow wow

those are some of the worst... luckily i have never had the stupidity to give cash for them... although i did waste money on 50 cents album... that shit sucked... what happened after "How to Rob"????? still, its not the worst of all time