I think it was staged but truth in jest.
Miley won in the last 5 seconds when she made herself seem like the 30 year old and Nicki the 20 something getting all philosophical with it.
She didn't lie.
You could tell Nicki was being extra because she knows Miley wasn't going to do anything and Miley was twirling her hair because she knew Nicki wasn't going to do anything.
I do think they are not as cool as before.
Both are millionaires, whatever...