Wait, didn't Soulja Boy just release a new mixtape, Gold On Deck, on Dec. 30? Of course he did, but you think that's going to stop someone as prolific as him from dropping a new project? Of course not. Dude's a studio rat and he's already put together a new mixtape in 50/13, which features a slew of new music from the 21-year-old rapper-producer. You can download the mixtape at Dat Piff and stream it below. Be sure to check for the last track, "Based," which features Young L.