Continuity mistake: When the Fighting Temptations are performing at the Gospel choir contest at the end, the convict with the high voice is dancing with only one handcuff attached (you can see him try to hide the other end, which is flapping around). In a subsequent shot, he has both handcuffs attached again.
Lilly: You know what Sally told me once? She said when like makes you have to put up with mean and hateful people, just think of 'em as sandpaper. They may scratch you, rub you the wrong way... But eventually, you'll end up smooth and polished. And the sandpaper? It's just gon' be worn out and ugly.