Ray J , as you know, was recently on death's door with a bunch of serious health issues — but now the R&B singer is back and stronger than ever, training his ass off for his upcoming MMA fight against Supah Hot Fire . TMZ obtained exclusive video of Ray getting into tip-top shape with his posse, which includes a couple of hot female influencers shaking their booties as Ray is pumping iron. As you can see ... Ray is taking this Saturday's match up very seriously as he spars with a partner and