Well, it just got real ... Chris Brown's daughter Royalty is now smack in the middle of his beef with Soulja Boy -- and Soulja's the one who put her there.
SB just posted a pic of 2-year-old Royalty with Floyd Mayweather and TheMoneyTeam tags on it -- making it seem like Chris' little girl wants to see Daddy get his ass whooped. To say, "low blow" ... would be an understatement.
Here's the thing -- Soulja didn't put the Floyd tags on the pic, Chris' baby mama, Nia Guzman did .