So, we've already seen the trailer for Tyler Perry's latest spun tale of urban redemption film, I Can Do Bad All By Myself. We also already know that both Gladys Knight and Mary J. Blige will be acting in the film, with us crossing our fingers that they don't embarrass us and themselves come across as believable. However, in this latest clip from the film, we get to see Mary prominently displayed, doing what she does best--sing. Here, she's putting it down in a fictitious nightclub, belting out the film's bluesy title track. I have a feeling these two minutes might just be better than the entire film. But I've been wrong before. In the meantime, the song's below.