She claims that bidding to swap places with her was stabbing her in the back.

I bet she would have done it if roles were reversed.

And in any case, why is it back stabbing?
Her suggesting that Nick shouldn't have done it means that she thinks her place in the final is more deserved, she is valuing herself above him. The game doesn't stop just when its in her favour and everyone must accept their fate, as though when the noms had finished everyone was in their rightful place.

I'm not a nick fan but I have no issue with what he did.

No she most certainly wasn't stabbed in the back. She's got a ridiculous sense of entitlement.

Currently my least fave.

Has Nick ever been that close to Chloe that he or she would consider themselves friends with each other?
I don't even remember seeing them talk to each other, if they ever have.

Everyone who pressed the buzzer put someone up for nomination and, in exchange, saved themselves. Unfortunately this very simple fact is lost on the nation's darling dullard and the majority of her naive, innocent fans.

How is it stabbing her in the back if he's doing it right in front of her??