HAVE A NECTARINE, GONK
I don't know who Josh Gibson is. As a non-sport fan I have at least heard of Akermanis. (Not that they cast this based on who I know, but it helps when they do).
I have a firm guess for the Loudmouth TV Star clue... Roxy Jacenko. She knows her way around reality TV set, has made a couple of appearances on Studio 10 in recent months and she is a loudmouth beauty and TV star.
OMG no, that description fits the nanny, and I hate her and hope it isn't, but she is a loud mouth, drop out, and I know she has said nuh, but they all do that.
Lock in Peter Rowsthorn.
Could it be Kathy Lette.