If BB were ever going to try to manipulate nominations to save someone, they'd do it this week to save Noirin. She is the show. But to be honest I don't think they manipulate the votes as often as people say. They let Victor go (though he shot himself in the foot with the wedding argument), Science (the only good housemate in BB6 for me), Nikki (then put her back in...yeah, that was dumb), people were going on about them trying to "save" Charley a lot during BB8, but she still went. The common pattern there, by the way, is that they all went in week 8...
For nominations...
Lisa: Will definitely nominate her.
David: Definitely nominate her.
Rodrigo: I'm almost certain he will, as he's still going on about the shopping list, and Marcus bitches about Noirin to him a lot.
Charlie: Very likely he'll nominate her (then pretend he's upset about it afterwards.)
Marcus: Small chance he'll nominate her (Tom and Siavash would seem more likely for him.)
Dogface: Unlikely, as she loves the drama and gossip.
Freddie: Can't see him nominating her.
Bea: No chance.
Hira: Who knows? We don't know how she feels about ANYTHING.
Tom: Very much doubt he'll nom her.
Siavash: Obviously not...unless she tells him she fancies Tom more than him!
I see her getting four nominations and being up. It'll be a split vote and Lisa, Tom and Marcus could be up too (I can see Hira picking up a few noms too.) Lisa has been REALLY under the radar lately. Noirin will go is my gut feeling, but if it does look like a vote where she has a chance to stay (which basically means Lisa needs to be up too) then of course I'll fight.